Whose

• POS: Definite Article

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]

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).