(a) As interrog. adv. in direct question, with nonlocative sense: to what purpose?, why?; (b) as rel. adv. introducing locative nonrestrictive adj. clauses: at which place, where; also, with ref. to a window: through which; (c) as subordinating conj. introducing a locative noun clause functioning as direct obj., with generalizing force: whatever place [2nd element may represent that particle; cp. wher adv. & conj. 5b.(c)].