who

Meaning of who in English

Interrogative pronoun

1. what or which person or people

Who is she?

Relative pronoun

1. ｟in restrictive use｠ of the kind that; that

Edison was an American inventor and businessman who has been described as America's greatest inventor.

2. ｟in non-restrictive use｠ and/but he, she, or they, used with comma

I lived with Mary, who taught me English.