The Collaborative International Dictionary of English v.0.48:

Affect \Af*fect"\, v. t. [imp. & p. p. Affected; p. pr. & vb.
   n. Affecting.] [L. affectus, p. p. of afficere to affect by
   active agency; ad + facere to make: cf. F. affectere, L.
   affectare, freq. of afficere. See Fact.]
   1. To act upon; to produce an effect or change upon.
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            As might affect the earth with cold heat. --Milton.
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            The climate affected their health and spirits.
                                                  --Macaulay.
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   2. To influence or move, as the feelings or passions; to
      touch.
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            A consideration of the rationale of our passions
            seems to me very necessary for all who would affect
            them upon solid and pure principles.
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   3. To love; to regard with affection. [Obs.]
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            As for Queen Katharine, he rather respected than
            affected, rather honored than loved, her. --Fuller.
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   4. To show a fondness for; to like to use or practice; to
      choose; hence, to frequent habitually.
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            For he does neither affect company, nor is he fit
            for it, indeed.                       --Shak.
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            Do not affect the society of your inferiors in rank,
            nor court that of the great. --Hazlitt.
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   5. To dispose or incline.
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            Men whom they thought best affected to religion and
            their country's liberty.              --Milton.
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   6. To aim at; to aspire; to covet. [Obs.]
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            This proud man affects imperial ?way. --Dryden.
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   7. To tend to by affinity or disposition.
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            The drops of every fluid affect a round figure.
                                                  --Newton.
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   8. To make a show of; to put on a pretense of; to feign; to
      assume; as, to affect ignorance.
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            Careless she is with artful care,
            Affecting to seem unaffected.         --Congreve.
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            Thou dost affect my manners.          --Shak.
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   9. To assign; to appoint. [R.]
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            One of the domestics was affected to his special
            service.                              --Thackeray.
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   Syn: To influence; operate; act on; concern; move; melt;
        soften; subdue; overcome; pretend; assume.
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The Collaborative International Dictionary of English v.0.48:

Affect \Af*fect"\ ([a^]f*f[e^]kt"), n. [L. affectus.]
   1. Affection; inclination; passion; feeling; disposition.
      [Obs.] --Shak.
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   2. (Psychotherapy) The emotional complex associated with an
      idea or mental state. In hysteria, the affect is sometimes
      entirely dissociated, sometimes transferred to another
      than the original idea.
      [Webster 1913 Suppl.]

WordNet (r) 3.0 (2006):

affect
    n 1: the conscious subjective aspect of feeling or emotion
    v 1: have an effect upon; "Will the new rules affect me?" [syn:
         affect, impact, bear upon, bear on, touch on,
         touch]
    2: act physically on; have an effect upon; "the medicine affects
       my heart rate"
    3: connect closely and often incriminatingly; "This new ruling
       affects your business" [syn: involve, affect, regard]
    4: make believe with the intent to deceive; "He feigned that he
       was ill"; "He shammed a headache" [syn: feign, sham,
       pretend, affect, dissemble]
    5: have an emotional or cognitive impact upon; "This child
       impressed me as unusually mature"; "This behavior struck me
       as odd" [syn: affect, impress, move, strike]