Definition from Wiktionary, the free dictionary
- (grammar) A pronoun that introduces a relative clause and refers to an antecedent. Some words that can be used as interrogative pronouns can alternatively be used as relative pronouns: what, which, who, whom, and whose. The other relative pronouns are whoever, whosoever, whomever, whatever, and that.
- The woman who is wearing the funny hat
- The funny hat that is on her head
pronoun that introduces a relative clause