The Collaborative International Dictionary of English v.0.48:

Condition \Con*di"tion\, n. [F., fr. L. conditio (better
   condicio) agreement, compact, condition; con- + a root
   signifying to show, point out, akin to dicere to say, dicare
   to proclaim, dedicate. See Teach, Token.]
   1. Mode or state of being; state or situation with regard to
      external circumstances or influences, or to physical or
      mental integrity, health, strength, etc.; predicament;
      rank; position, estate.
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            I am in my condition
            A prince, Miranda; I do think, a king. --Shak.
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            And O, what man's condition can be worse
            Than his whom plenty starves and blessings curse?
                                                  --Cowley.
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            The new conditions of life.           --Darwin.
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   2. Essential quality; property; attribute.
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            It seemed to us a condition and property of divine
            powers and beings to be hidden and unseen to others.
                                                  --Bacon.
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   3. Temperament; disposition; character. [Obs.]
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            The condition of a saint and the complexion of a
            devil.                                --Shak.
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   4. That which must exist as the occasion or concomitant of
      something else; that which is requisite in order that
      something else should take effect; an essential
      qualification; stipulation; terms specified.
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            I had as lief take her dowry with this condition, to
            be whipped at the high cross every morning. --Shak.
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            Many are apt to believe remission of sins, but they
            believe it without the condition of repentance.
                                                  --Jer. Taylor.
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   5. (Law) A clause in a contract, or agreement, which has for
      its object to suspend, to defeat, or in some way to
      modify, the principal obligation; or, in case of a will,
      to suspend, revoke, or modify a devise or bequest. It is
      also the case of a future uncertain event, which may or
      may not happen, and on the occurrence or non-occurrence of
      which, the accomplishment, recission, or modification of
      an obligation or testamentary disposition is made to
      depend. --Blount. Tomlins. Bouvier. Wharton.
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   Equation of condition. (Math.) See under Equation.

   On condition or Upon condition (that), used for if in
      introducing conditional sentences. "Upon condition thou
      wilt swear to pay him tribute . . . thou shalt be placed
      as viceroy under him." --Shak.

   Conditions of sale, the terms on which it is proposed to
      sell property by auction; also, the instrument containing
      or expressing these terms.

   Syn: State; situation; circumstances; station; case; mode;
        plight; predicament; stipulation; qualification;
        requisite; article; provision; arrangement. See State.
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The Collaborative International Dictionary of English v.0.48:

Condition \Con*di"tion\, v. i. [imp. & p. p. Conditioned; p.
   pr. & vb. n. Conditioning.]
   1. To make terms; to stipulate.
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            Pay me back my credit,
            And I'll condition with ye.           --Beau. & Fl.
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   2. (Metaph.) To impose upon an object those relations or
      conditions without which knowledge and thought are alleged
      to be impossible.
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            To think of a thing is to condition.  --Sir W.
                                                  Hamilton.
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The Collaborative International Dictionary of English v.0.48:

Condition \Con*di"tion\, v. t. [Cf. LL. conditionare. See
   Condition, n.]
   1. To invest with, or limit by, conditions; to burden or
      qualify by a condition; to impose or be imposed as the
      condition of.
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            Seas, that daily gain upon the shore,
            Have ebb and flow conditioning their march.
                                                  --Tennyson.
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   2. To contract; to stipulate; to agree.
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            It was conditioned between Saturn and Titan, that
            Saturn should put to death all his male children.
                                                  --Sir W.
                                                  Raleigh.
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   3. (U. S. Colleges) To put under conditions; to require to
      pass a new examination or to make up a specified study, as
      a condition of remaining in one's class or in college; as,
      to condition a student who has failed in some branch of
      study.
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   4. To test or assay, as silk (to ascertain the proportion of
      moisture it contains). --McElrath.
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WordNet (r) 3.0 (2006):

condition
    n 1: a state at a particular time; "a condition (or state) of
         disrepair"; "the current status of the arms negotiations"
         [syn: condition, status]
    2: an assumption on which rests the validity or effect of
       something else [syn: condition, precondition,
       stipulation]
    3: a mode of being or form of existence of a person or thing;
       "the human condition"
    4: information that should be kept in mind when making a
       decision; "another consideration is the time it would take"
       [syn: circumstance, condition, consideration]
    5: the state of (good) health (especially in the phrases `in
       condition' or `in shape' or `out of condition' or `out of
       shape') [syn: condition, shape]
    6: an illness, disease, or other medical problem; "a heart
       condition"; "a skin condition"
    7: (usually plural) a statement of what is required as part of
       an agreement; "the contract set out the conditions of the
       lease"; "the terms of the treaty were generous" [syn:
       condition, term]
    8: the procedure that is varied in order to estimate a
       variable's effect by comparison with a control condition
       [syn: condition, experimental condition]
    v 1: establish a conditioned response
    2: develop (children's) behavior by instruction and practice;
       especially to teach self-control; "Parents must discipline
       their children"; "Is this dog trained?" [syn: discipline,
       train, check, condition]
    3: specify as a condition or requirement in a contract or
       agreement; make an express demand or provision in an
       agreement; "The will stipulates that she can live in the
       house for the rest of her life"; "The contract stipulates the
       dates of the payments" [syn: stipulate, qualify,
       condition, specify]
    4: put into a better state; "he conditions old cars"
    5: apply conditioner to in order to make smooth and shiny; "I
       condition my hair after washing it"