Meaning of “them” - Learner’s Dictionary

them

pronoun uk us strong /ðem/ weak /ðəm/
GROUP

A1 used after a verb or preposition to refer to a group of people, animals, or things that have already been talked about:

I'm looking for my keys - have you seen them?
HIM/HER

B1 used after a verb or preposition to refer to a person when you want to avoid saying 'him' or 'her' or when you do not know if the person is male or female:

When each passenger arrives we ask them to fill in a form.

(Definition of “them” from the Cambridge Learner’s Dictionary © Cambridge University Press)