noun
Refers to a person who moves to another country or region to live. The direction (immigration vs. emigration) depends on context.
彼はカナダへの移住民として新しい生活を始めた。
He started a new life as an immigrant to Canada.
19世紀には多くの移住民がアメリカに
In the 19th century, many migrants crossed over to America.
入植者 means 'settler' or 'colonist', emphasizing establishing a new settlement, whereas 移住民 is a broader term for any migrant.
Compound of 移住 (いじゅう, 'migration') + 民 (みん, 'people').