移民 (yímín) can function as both a noun and a verb. As a noun, it means immigrants or immigration. As a verb, it means to immigrate or emigrate. It commonly appears in formal and news contexts, such as 移民部长 (immigration minister).
他的父母二十年前移民到了加拿大。
Tā de fùmǔ èrshí nián qián yímín dào le Jiānádà.
His parents immigrated to Canada twenty years ago.
移民部长宣布了新的签证政策。
Yímín bùzhǎng xuānbù le xīn de qiānzhèng zhèngcè.
The immigration minister announced a new visa policy.
这个城市有很多来自不同国家的移民。
Zhège chéngshì yǒu hěn duō lái zì bùtóng guójiā de yímín.
This city has many immigrants from different countries.