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

for \for\, conj.
   1. because; by reason that; for that; indicating, in old
      english, the reason of anything.
      1913 webster

            and for of long that way had walk'ed none,
            the vault was hid with plants and bushes hoar.
                                                  --fairfax.
      1913 webster

            and heaven defend your good souls, that you think
            i will your serious and great business scant,
            for she with me.                      --shak.
      1913 webster

   2. since; because; introducing a reason of something before
      advanced, a cause, motive, explanation, justification, or
      the like, of an action related or a statement made. it is
      logically nearly equivalent to since, or because, but
      connects less closely, and is sometimes used as a very
      general introduction to something suggested by what has
      gone before.
      1913 webster

            give thanks unto the lord; for he is good; for his
            mercy endureth forever.               --ps. cxxxvi.
                                                  1.
      1913 webster

            heaven doth with us as we with torches do,
            not light them for themselves; for if our virtues
            did not go forth of us, 't were all alike
            as if we had them not.                --shak.
      1913 webster

   for because, because. obs. "nor for because they set less
      store by their own citizens." --robynson more's utopia.

   for why.
      a why; for that reason; wherefore. obs.
      b because. obs. see forwhy.

   syn: see because.
        1913 webster
see also:
for because for why forwhy because 

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

why \why\, adv. oe. whi, why, as. hwimac, hw?, instrumental
   case of hw=a, hwaet; akin to icel. hvimac why, dan. 
   sw. hvi; cf. goth. hw?. ?. see who.
   1913 webster
   1. for what cause, reason, or purpose; on what account;
      wherefore; -- used interrogatively. see the note under
      what, pron., 1.
      1913 webster

            turn ye, turn ye from your evil ways; for why will
            ye die, o house of israel?            --ezek.
                                                  xxxiii. 11.
      1913 webster

   2. for which; on account of which; -- used relatively.
      1913 webster

            no ground of enmity between us known
            why he should mean me ill or seek to harm. --milton.
      1913 webster

            turn the discourse; i have a reason why
            i would not have you speak so tenderly. --dryden.
      1913 webster

   3. the reason or cause for which; that on account of which;
      on what account; as, i know not why he left town so
      suddenly; -- used as a compound relative.
      1913 webster

   note: why is sometimes used as an interjection or an
         expletive in expression of surprise or content at a
         turn of affairs; used also in calling. "why, jessica"
         --shak.
         1913 webster

               if her chill heart i can not move,
               why, i'll enjoy the very love.     --cowley.
         1913 webster sometimes, also, it is used as a noun.
         1913 webster

               the how and the why and the where. --goldsmith.
         1913 webster

   for why, because; why. see forwhy. obs. or colloq.
      1913 webster
see also:
who what for why forwhy 

Why >> W Words
Why, definition of term: Why
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