[1] : The Collaborative International Dictionary of English v.0.48

which \which\, pron. oe. which, whilk, as. hwilc, hwylc, hwelc,
   from the root of hw=a who + limacc body; hence properly,
   of what sort or kind; akin to os. hwilik which, ofries.
   hwelik, d. welk, g. welch, ohg. welimach, hwelimach,
   icel. hvimaclimackr, dan.  sw. hvilken, goth. hwileiks,
   hw?leiks; cf. l. qualis. ????. see who, and like, a., and
   cf. such.
   1913 webster
   1. of what sort or kind; what; what a; who. obs.
      1913 webster

            and which they weren and of what degree. --chaucer.
      1913 webster

   2. 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.
      1913 webster

            which of you convinceth me of sin?    --john viii.
                                                  46.
      1913 webster

   3. 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.
      1913 webster

            and when thou fail'st -- as god forbid the hour 
            must edward fall, which peril heaven forfend
                                                  --shak.
      1913 webster

            god . . . rested on the seventh day from all his
            work which he had made.               --gen. ii. 2.
      1913 webster

            our father, which art in heaven.      --matt. vi. 9.
      1913 webster

            the temple of god is holy, which temple ye are. --1
                                                  cor. iii. 17.
      1913 webster

   4. 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.
      1913 webster

   note: the which was formerly often used for which. the
         expressions which that, which as, were also sometimes
         used by way of emphasis.
         1913 webster

               do not they blaspheme that worthy name by the
               which ye are called?               --james ii. 7.
         1913 webster

   note: which, referring to a series of preceding sentences, or
         members of a sentence, may have all joined to it
         adjectively. "all which, as a method of a proclamation,
         is very convenient." --carlyle.
         1913 webster whichever
see also:
who like such what 

Which >> W Words
Which, definition of term: Which
which_pag1.html

Of Which >> O Words
Of Which, definition of term: Of Which
of+which_pag1.html