Who  pron. (obj. Whom or colloq. Who; poss. Whose) 1 a what or which person or persons? (who called?; you know who it was). B what sort of person or persons? (who am i to object?). 2 (a person) that (anyone who wishes can come; the woman whom you met; the man who you saw). 3 and or but he, they, etc. (gave it to tom, who sold it to jim). [old english]