The Collaborative International Dictionary of English v.0.48:
For \For\, prep. [AS. for, fore; akin to OS. for, fora, furi, D.
   voor, OHG. fora, G. vor, OHG. furi, G. f["u]r, Icel. fyrir,
   Sw. f["o]r, Dan. for, adv. f["o]r, Goth. fa['u]r, fa['u]ra,
   L. pro, Gr. ?, Skr. pra-. [root] 202. Cf. Fore, First,
   Foremost, Forth, Pro-.]
   In the most general sense, indicating that in consideration
   of, in view of, or with reference to, which anything is done
   or takes place.
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   1. Indicating the antecedent cause or occasion of an action;
      the motive or inducement accompanying and prompting to an
      act or state; the reason of anything; that on account of
      which a thing is or is done.
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            With fiery eyes sparkling for very wrath. --Shak.
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            How to choose dogs for scent or speed. --Waller.
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            Now, for so many glorious actions done,
            For peace at home, and for the public wealth,
            I mean to crown a bowl for C[ae]sar's health.
                                                  --Dryden.
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            That which we, for our unworthiness, are afraid to
            crave, our prayer is, that God, for the worthiness
            of his Son, would, notwithstanding, vouchsafe to
            grant.                                --Hooker.
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   2. Indicating the remoter and indirect object of an act; the
      end or final cause with reference to which anything is,
      acts, serves, or is done.
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            The oak for nothing ill,
            The osier good for twigs, the poplar for the mill.
                                                  --Spenser.
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            It was young counsel for the persons, and violent
            counsel for the matters.              --Bacon.
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            Shall I think the worls was made for one,
            And men are born for kings, as beasts for men,
            Not for protection, but to be devoured? --Dryden.
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            For he writes not for money, nor for praise.
                                                  --Denham.
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   3. Indicating that in favor of which, or in promoting which,
      anything is, or is done; hence, in behalf of; in favor of;
      on the side of; -- opposed to against.
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            We can do nothing against the truth, but for the
            truth.                                --2 Cor. xiii.
                                                  8.
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            It is for the general good of human society, and
            consequently of particular persons, to be true and
            just; and it is for men's health to be temperate.
                                                  --Tillotson.
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            Aristotle is for poetical justice.    --Dennis.
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   4. Indicating that toward which the action of anything is
      directed, or the point toward which motion is made;
      ?ntending to go to.
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            We sailed from Peru for China and Japan. --Bacon.
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   5. Indicating that on place of or instead of which anything
      acts or serves, or that to which a substitute, an
      equivalent, a compensation, or the like, is offered or
      made; instead of, or place of.
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            And if any mischief follow, then thou shalt give
            life for life, eye for eye, tooth for tooth, hand
            for hand, foot for foot.              --Ex. xxi. 23,
                                                  24.
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   6. Indicating that in the character of or as being which
      anything is regarded or treated; to be, or as being.
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            We take a falling meteor for a star.  --Cowley.
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            If a man can be fully assured of anything for a
            truth, without having examined, what is there that
            he may not embrace for tru??          --Locke.
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            Most of our ingenious young men take up some
            cried-up English poet for their model. --Dryden.
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            But let her go for an ungrateful woman. --Philips.
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   7. Indicating that instead of which something else controls
      in the performing of an action, or that in spite of which
      anything is done, occurs, or is; hence, equivalent to
      notwithstanding, in spite of; -- generally followed by
      all, aught, anything, etc.
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            The writer will do what she please for all me.
                                                  --Spectator.
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            God's desertion shall, for aught he knows, the next
            minute supervene.                     --Dr. H. More.
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            For anything that legally appears to the contrary,
            it may be a contrivance to fright us. --Swift.
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   8. Indicating the space or time through which an action or
      state extends; hence, during; in or through the space or
      time of.
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            For many miles about
            There 's scarce a bush.               --Shak.
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            Since, hired for life, thy servile muse sing.
                                                  --prior.
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            To guide the sun's bright chariot for a day.
                                                  --Garth.
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   9. Indicating that in prevention of which, or through fear of
      which, anything is done. [Obs.]
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            We 'll have a bib, for spoiling of thy doublet.
                                                  --Beau. & Fl.
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   For, or As for, so far as concerns; as regards; with
      reference to; -- used parenthetically or independently.
      See under As.
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            As for me and my house, we will serve the Lord.
                                                  --Josh. xxiv.
                                                  15.
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            For me, my stormy voyage at an end,
            I to the port of death securely tend. --Dryden.
   For all that, notwithstanding; in spite of.
   For all the world, wholly; exactly. "Whose posy was, for
      all the world, like cutlers' poetry." --Shak.
   For as much as, or Forasmuch as, in consideration that;
      seeing that; since.
   For by. See Forby, adv.
   For ever, eternally; at all times. See Forever.
   For me, or For all me, as far as regards me.
   For my life, or For the life of me, if my life depended
      on it. [Colloq.] --T. Hook.
   For that, For the reason that, because; since. [Obs.]
      "For that I love your daughter." --Shak.
   For thy, or Forthy [AS. for[eth][=y].], for this; on this
      account. [Obs.] "Thomalin, have no care for thy."
      --Spenser.
   For to, as sign of infinitive, in order to; to the end of.
      [Obs., except as sometimes heard in illiterate speech.] --
      "What went ye out for to see?" --Luke vii. 25. See To,
      prep., 4.
   O for, would that I had; may there be granted; --
      elliptically expressing desire or prayer. "O for a muse of
      fire." --Shak.
   Were it not for, or If it were not for, leaving out of
      account; but for the presence or action of. "Moral
      consideration can no way move the sensible appetite, were
      it not for the will." --Sir M. Hale.
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The Collaborative International Dictionary of English v.0.48:
as \as\ ([a^]z), adv. & conj. [OE. as, als, alse, also, al swa,
   AS. eal sw[=a], lit. all so; hence, quite so, quite as: cf.
   G. als as, than, also so, then. See Also.]
   1. Denoting equality or likeness in kind, degree, or manner;
      like; similar to; in the same manner with or in which; in
      accordance with; in proportion to; to the extent or degree
      in which or to which; equally; no less than; as, ye shall
      be as gods, knowing good and evil; you will reap as you
      sow; do as you are bidden.
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            His spiritual attendants adjured him, as he loved
            his soul, to emancipate his brethren. --Macaulay.
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   Note: As is often preceded by one of the antecedent or
         correlative words such, same, so, or as, in expressing
         an equality or comparison; as, give us such things as
         you please, and so long as you please, or as long as
         you please; he is not so brave as Cato; she is as
         amiable as she is handsome; come as quickly as
         possible. "Bees appear fortunately to prefer the same
         colors as we do." --Lubbock. As, in a preceding part of
         a sentence, has such or so to answer correlatively to
         it; as with the people, so with the priest.
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   2. In the idea, character, or condition of, -- limiting the
      view to certain attributes or relations; as, virtue
      considered as virtue; this actor will appear as Hamlet.
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            The beggar is greater as a man, than is the man
            merely as a king.                     --Dewey.
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   3. While; during or at the same time that; when; as, he
      trembled as he spoke.
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            As I return I will fetch off these justices. --Shak.
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   4. Because; since; it being the case that.
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            As the population of Scotland had been generally
            trained to arms . . . they were not indifferently
            prepared.                             --Sir W.
                                                  Scott.
      [1913 Webster] [See Synonym under Because.]
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   5. Expressing concession. (Often approaching though in
      meaning).
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            We wish, however, to avail ourselves of the
            interest, transient as it may be, which this work
            has excited.                          --Macaulay.
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   6. That, introducing or expressing a result or consequence,
      after the correlatives so and such. [Obs.]
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            I can place thee in such abject state, as help shall
            never find thee.                      --Rowe.
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   So as, so that. [Obs.]
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            The relations are so uncertain as they require a
            great deal of examination.            --Bacon.
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   7. As if; as though. [Obs. or Poetic]
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            He lies, as he his bliss did know.    --Waller.
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   8. For instance; by way of example; thus; -- used to
      introduce illustrative phrases, sentences, or citations.
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   9. Than. [Obs. & R.]
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            The king was not more forward to bestow favors on
            them as they free to deal affronts to others their
            superiors.                            --Fuller.
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   10. Expressing a wish. [Obs.] "As have,"
   Note: i. e., may he have. --Chaucer.
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   As . . as. See So . . as, under So.
   As far as, to the extent or degree. "As far as can be
      ascertained." --Macaulay.
   As far forth as, as far as. [Obs.] --Chaucer.
   As for, or As to, in regard to; with respect to.
   As good as, not less than; not falling short of.
   As good as one's word, faithful to a promise.
   As if, or As though, of the same kind, or in the same
      condition or manner, that it would be if.
   As it were (as if it were), a qualifying phrase used to
      apologize for or to relieve some expression which might be
      regarded as inappropriate or incongruous; in a manner.
   As now, just now. [Obs.] --Chaucer.
   As swythe, as quickly as possible. [Obs.] --Chaucer.
   As well, also; too; besides. --Addison.
   As well as, equally with, no less than. "I have
      understanding as well as you." --Job xii. 3.
   As yet, until now; up to or at the present time; still;
      now.
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