/ huːz; NAmE / determiner , pronoun
1.
used in questions to ask who sth belongs to :
Whose house is that?
I wonder whose this is.
2.
used to say which person or thing you mean :
He's a man whose opinion I respect.
It's the house whose door is painted red.
3.
used to give more information about a person or thing :
Isobel, whose brother he was, had heard the joke before.
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WORD ORIGIN
Old English hwæs , genitive of hwā who and hwæt what .