whom
US /huːm/
UK /huːm/

1.
谁, 哪个人
used instead of 'who' as the object of a verb or preposition
:
•
To whom it may concern.
致有关人士。
•
He is the man whom I saw yesterday.
他就是我昨天见到的那个人。
谁, 哪个人
used instead of 'who' as the object of a verb or preposition