Definitions

1. pronoun

used to ask for or give information about the person or people that something belongs to

“Whose book is this?”

2. interrogative

used to ask for information about the person or people that something belongs to

“Whose is this?”

3. adverb

used to ask for information about the person or people that something belongs to, or to indicate that something belongs to the person or people mentioned

“This is whose car is parked outside.”

4. noun

a possessive pronoun

“Whose is a possessive pronoun.”