Relative pronoun
WordNet
noun
(1) A pronoun (as `that' or `which' or `who') that introduces a relative clause referring to some antecedent
WiktionaryText
Noun
- A pronoun that introduces a relative clause and refers to an antecedent. The interrogative pronouns can be used as relative pronouns: what, which, who, whom, and whose.
- who in The woman who is wearing the funny hat
- that in The funny hat that is on her head