a. Of what sort or kind; what; what a; who.
a. A interrogative pronoun, used both substantively and
adjectively, and in direct and indirect questions, to ask for, or refer
to, an individual person or thing among several of a class; as, which
man is it? which woman was it? which is the house? he asked which route
he should take; which is best, to live or to die? See the Note under
What, pron., 1.
pron. A relative pronoun, used esp. in referring to an
antecedent noun or clause, but sometimes with reference to what is
specified or implied in a sentence, or to a following noun or clause
(generally involving a reference, however, to something which has
preceded). It is used in all numbers and genders, and was formerly used
of persons.
pron. A compound relative or indefinite pronoun, standing for
any one which, whichever, that which, those which, the . . . which, and
the like; as, take which you will.
