which's

Pronoun

which's

1. (colloquial, nonstandard, proscribed) Of which; alternative to inanimate sense of “whose”.
   • Do you happen to know if - gosh, I've forgotten his name - from the zoo film unit is still operating at that little film studio which's name I've also forgot?2001, Jane Goodall, Beyond Innocence: An Autobiography in Letters : the Later Years, page 116

   Synonyms:

   of which, whose, whereof

2. Of or pertaining to [some noun phrase ending with] which.
   • Whereas we are informed that the small pox prevails at New York, Connecticut, &c, the preventing of which’s coming into this place is of the utmost consequence, all persons are hereby notified that orders are given by us for all vessells coming into this port to hoist a jack at the main topmast...1899, Minisink Valley Historical Society, Collections, Connecticut Historical Society, page 86
   • The yield is comparable to the best corporate securities, each of which’s principal is relatively safe.1992, Jack Rabin, Handbook of Public Budgeting, CRC Press, page 476