The word "whose" is used as a possessive pronoun to indicate ownership or possession. It is employed in sentences or clauses to show who something belongs to or is associated with. For example, in questions like "Whose car is this?" or statements like "John, whose dog barked all night, is loathed by his neighbors," "whose" indicates possession. "Whose" is the possessive form of "who" and can be used for people, animals, or things. It is used when asking ownership (e.g., "Whose shoes are these?") or in relative clauses where possession matters (e.g., "the man whose name escaped me"). It should not be confused with "who’s," which is a contraction of "who is" or "who has." In summary, use "whose" to indicate possession or belonging, either in questions or relative clauses about possession.