noun
how many people; a number of people
Used to ask about or state the number of people. In questions, it means 'how many people?'; in statements, it can mean 'several people' or 'a number of people'.
パーティーには何人くらい来ますか。
About how many people will come to the party?
何人かがもう帰りました。
A few people have already gone home.