whose

POS

Definite Article

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CIDE DICTIONARY

whose, pron. [OE. whos, whas, AS. hwæs, gen. of hwā. See Who.].

The possessive case of who or which. See Who, and Which. [1913 Webster]

"Whose daughter art thou? tell me, I pray thee." [1913 Webster]

"The question whose solution I require." [1913 Webster]

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OXFORD DICTIONARY

whose, pron. & adj.
--pron. of or belonging to which person (whose is this book?).
--adj. of whom or which (whose book is this?; the man, whose name was Tim; the house whose roof was damaged).