An immigrant is a person who moves from one country to another with the intention of settling there, whether temporarily or permanently. That sounds simple, but in practice the word carries legal, social, and political weight that shifts depending on who is using it and why. The line between an immigrant, a migrant, a refugee, and an expatriate is blurrier than most people assume, and the definition you encounter depends heavily on context.
What Separates an Immigrant From a Migrant or an Emigrant
The three terms describe the same act of moving but from different vantage points. An emigrant is someone viewed from the perspective of the country they left. An immigrant is that same person viewed from the perspective of the country they arrived in. And a migrant is a broader umbrella term that covers anyone who moves, regardless of direction, duration, or legal status. International organizations like the United Nations tend to prefer “migrant” because it avoids implying anything about a person’s legal standing or permanence of stay. Governments issuing visas and green cards prefer “immigrant” because their systems are built around sorting people into categories with specific rights and restrictions.
In everyday speech, “immigrant” almost always means someone who has crossed an international border. People who relocate within the same country are usually called internal migrants, not immigrants, even though the disruption to their lives can be just as significant. The distinction matters because international immigrants face a layer of legal complexity that domestic movers do not: visas, residency permits, citizenship pathways, and the constant possibility that their right to stay could be revoked.
Generational Labels and Why They Get Complicated
Once a person immigrates, researchers and policymakers need a way to talk about their children and grandchildren. The standard framework is straightforward on the surface: a person who moves to a new country is a first-generation immigrant, and their children born in that country are second-generation immigrants.1International Migration Review. Ages, Life Stages, and Generational Cohorts: Decomposing the Immigrant First and Second Generations in the United States By the third generation, researchers typically stop using the immigrant label altogether, since those individuals were born in the country to parents who were also born there.
The messier middle ground involves children who were born abroad but brought to the new country young. A child who arrives at age two has a fundamentally different experience from a teenager who arrives at fifteen, even though both are technically first-generation. To capture that difference, researchers developed the concept of the 1.5 generation for children who immigrate during childhood or adolescence. Some scholars refine this further: children who arrive before age five are sometimes called generation 1.75 because their experience closely mirrors the second generation, while those who arrive as teenagers are called generation 1.25 because their experience more closely resembles adult first-generation immigrants.2Research Starter. Immigrant generations
These labels are not just academic shorthand. They correlate with real differences in language acquisition, educational outcomes, identity formation, and sense of belonging. A child who arrives before school age typically grows up bilingual or dominant in the new country’s language, while a teenager who arrives mid-high-school may always feel caught between two worlds linguistically and culturally.
The Forced-Voluntary Spectrum
One of the most consequential distinctions in immigration is between people who choose to move and people who feel they have no choice. International law draws a sharp line here: refugees are people fleeing persecution and are entitled to specific legal protections, while migrants are assumed to be moving voluntarily and get far fewer guarantees. But that binary is increasingly difficult to defend.
Consider someone who leaves a country where their sexual orientation is criminalized. Are they a refugee or a voluntary migrant? What about someone who leaves because drought has destroyed their livelihood, or because gang violence has made their neighborhood unlivable even though they are not personally targeted? Research in refugee law has argued that the forced-refugee-versus-voluntary-migrant distinction should not be treated as a neutral legal fact, because the reality is that migration motives exist on a continuum rather than in two neat categories.3International Journal of Refugee Law. ‘Forced’ Refugees versus ‘Voluntary’ Migrants: Deconstructing a Binary through SOGIESC Claims of Asylum
The practical consequence is that people whose reasons for moving fall in the gray zone often lack legal protection under either framework. They do not qualify for refugee status because they are not fleeing a recognized form of persecution, but calling their migration “voluntary” stretches the meaning of that word past the breaking point.
Climate Displacement and the Legal Gap
Climate-driven migration sits squarely in that gray zone. Rising sea levels, desertification, and increasingly severe storms are displacing communities around the world, but international law has no established category for people who move because their environment has become uninhabitable. The 1951 Refugee Convention was written to address political persecution, and the framework for internally displaced persons was designed for people who remain within their own country’s borders. Neither was built to handle cross-border movement driven by environmental collapse.4Law & Policy. Turning the Tide: Recognizing Climate Change Refugees in International Law
This means that someone forced to leave a Pacific island nation because it is literally sinking has no automatic legal right to resettle elsewhere. Proposals for a new international instrument specifically recognizing climate refugees have been circulating for years, but no binding agreement exists. In the meantime, people displaced by climate change are processed through the same immigration systems as everyone else, competing for the same visas and asylum slots designed for entirely different circumstances.
The Terminology Around Irregular Status
Few aspects of immigration vocabulary generate as much debate as what to call people who are in a country without authorization. The three most common English-language terms are “illegal migrant,” “irregular migrant,” and “undocumented migrant,” and each carries different connotations.5Review of European and Comparative Law. Transformation of Migration Terminology: From ‘Illegal Migrant’ to ‘Irregular Migrant’ (English-Ukrainian Aspect)
“Illegal” implies criminality and has been criticized for reducing a person’s entire identity to their immigration status. Many news organizations and international bodies, including the United Nations, have moved away from it. “Undocumented” is the most common alternative in American English and emphasizes the absence of papers rather than the presence of criminal intent. “Irregular” is preferred by European institutions and international organizations because it describes the status without moralizing about the person. The shift in preferred terminology over the past two decades reflects a broader recognition that immigration violations are often administrative rather than criminal, and that language shapes public attitudes toward the people being described.
When “Expatriate” Really Means “Immigrant”
There is a revealing double standard in how the word “immigrant” gets applied. A software engineer from India working in Silicon Valley is commonly called an immigrant. A British finance executive working in Hong Kong is called an expatriate. Both moved to a new country for work. Both may stay for years or permanently. The difference in terminology often tracks with race, class, and nationality rather than with any meaningful difference in the act of migration itself.
Research on international management literature has documented this pattern directly. The term “expatriate” in corporate contexts refers to a specific minority of relatively privileged people moved across borders by multinational corporations, while “migrant” is applied to the much larger population of less privileged workers who also cross borders for employment, often working in or for the same corporations.6Gender, Work & Organization. ‘Expatriates’: Gender, Race and Class Distinctions in International Management The people in this larger group are disproportionately women, people of color, and workers with less formal education. Functionally, an expatriate and an immigrant are doing the same thing. The vocabulary difference reveals more about social hierarchies than about migration patterns.
Temporary, Permanent, and Everything in Between
Immigration law generally divides people into temporary and permanent categories. Temporary visas have expiration dates and often restrict what kind of work you can do. Permanent residency grants the right to stay indefinitely. But lived experience rarely matches these tidy legal bins.
Ethnographic research among Chinese migrants in Australia found that people who arrived on temporary work visas intending to quickly gain permanent residency sometimes spent years in liminal status as shifting legislation and changing circumstances blocked their path. Meanwhile, others who arrived as self-described temporary sojourners ended up becoming permanent residents almost by accident, yet still felt a limited sense of belonging even after years of legal permanence.7Current Sociology. Temporary work, permanent visas and circular dreams: Temporal disjunctures and precarity among Chinese migrants to Australia The point is that a visa category tells you what the government thinks you are. It may say very little about how you experience your own migration or what your future holds.
Circular migration adds another wrinkle. Some people move back and forth between countries repeatedly, working abroad for a period and then returning home before leaving again. Policymakers have sometimes promoted circular migration as a compromise that benefits everyone, but researchers have raised questions about whether such programs functionally recreate the problems of older “guest worker” schemes, where workers had few rights and limited paths to permanent settlement.8International Migration. Does Circular Migration Lead to “Guest Worker” Outcomes?
How Countries Decide Who Counts as a Desirable Immigrant
Every country that accepts immigrants has a system for deciding whom to let in, and those systems encode different values. The United States has historically organized its immigration system primarily around family reunification: if you have close relatives who are citizens or permanent residents, that is your strongest path to a visa. Countries like Australia, Canada, and the United Kingdom have built their systems around points-based selection, which scores applicants on factors like education, language ability, work experience, and age, with the explicit goal of attracting high-skilled workers.9Kiel Institute for the World Economy. Family reunification or point-based immigration system? The case of the United States and Mexico
Neither system is purely one thing. The United States has employment-based visa categories, and points-based countries still allow family-sponsored immigration. But the emphasis is different, and it shapes the composition of each country’s immigrant population in ways that ripple through demographics, economics, and politics for generations. A family-reunification system tends to produce chain migration, where one person’s arrival gradually pulls in a wider network of relatives. A points-based system tends to produce a more educationally credentialed immigrant population but can leave families separated for years.
Digital Nomads and the Newest Category
Remote work has created a type of international mover that does not fit neatly into traditional immigration categories. Digital nomads live in one country while working remotely for employers or clients in another. They are not immigrating in the traditional sense because they often do not intend to settle permanently, but they are also not tourists because they are earning income. Since 2020, a growing number of countries have introduced specific “digital nomad” visas to attract these workers, recognizing them as a distinct type of international migrant.10PubMed Central. Digital Nomadism and the Emergence of Digital Nomad Visas: What Policy Objectives Do States Aim to Achieve?
The appeal for countries offering these visas is economic: digital nomads spend money locally while drawing salaries from abroad, injecting foreign currency without competing for local jobs. But the arrangement raises questions about taxation, labor protections, and whether a person spending eleven months a year in a country on a “nomad visa” is meaningfully different from an immigrant. The category also highlights a class dimension similar to the expatriate-immigrant divide: digital nomad visas are overwhelmingly used by professionals from wealthy countries, and the freedom to work from anywhere is itself a privilege tied to passport strength and earning power.
Public Perception Rarely Matches Demographic Reality
People consistently overestimate how many immigrants live in their country. Research across European nations found that individuals frequently perceive immigrant and minority population sizes to be much larger than they actually are.11Public Opinion Quarterly. How Many Immigrants? Foreign-Born Population Innumeracy in Europe This pattern, sometimes called population innumeracy, is not limited to any one political group or education level, though the degree of overestimation varies. The gap between perception and reality matters because inflated estimates tend to correlate with more negative attitudes toward immigration, which in turn shapes voting behavior and policy outcomes.
Part of the explanation is that immigrants are often concentrated in specific neighborhoods and industries, which can make a small population feel much larger to people who encounter it daily. Media coverage also plays a role: immigration stories tend to be dramatic and conflict-driven, which can amplify the sense that immigration is a bigger phenomenon than the actual numbers suggest. None of this means concerns about immigration are illegitimate, but it does mean that the factual basis people use when forming those concerns is often significantly off.
Transnationalism and Belonging Across Borders
The traditional model of immigration assumed a clean break: you leave one country, arrive in another, and gradually assimilate. Modern immigration looks nothing like that for many people. Cheap flights, video calls, and international banking mean that immigrants can remain deeply embedded in their home country’s social, economic, and political life while simultaneously building a life in their new country. Researchers call this transnationalism, and it has forced a rethinking of what citizenship and belonging actually mean.
Dual citizenship is one visible expression of this shift. A growing number of countries now permit their citizens to hold citizenship in another country simultaneously, which would have been rare or legally impossible a few decades ago. Research on international migration and citizenship has documented how practices like dual citizenship, transnational political participation, and naturalization have begun to reshape the concept of belonging itself, moving it away from exclusive national identity and toward something more fluid, centered on where you live and how you participate in civic life rather than simply where you were born.12PubMed Central. The shifting of traditional understanding of citizenship due to international migration
For the individual immigrant, transnationalism can be a source of richness and resilience, but also of tension. Maintaining ties to a home country while building a life in a new one requires constant negotiation. Governments, for their part, are still catching up. Immigration systems were designed for a world in which you lived in one country at a time and owed loyalty to one flag. The reality of millions of people who live between countries, send money home, vote in two elections, and hold two passports does not fit that framework cleanly, and the mismatch is a source of ongoing legal and political friction on every continent.