The Collaborative International Dictionary of English v.0.48:

Consider \Con*sid"er\ (k[o^]n*s[i^]d"[~e]r), v. t. [imp. & p. p.
   Considered (k[o^]n*s[i^]d"[~e]rd); p. pr. & vb. n.
   Considering.] [F. consid['e]rer, L. considerare,
   -sideratum, to consider, view attentively, prob. fr. con- +
   sidus, sideris, star, constellation; orig., therefore, to
   look at the stars. See Sidereal, and cf. Desire.]
   1. To fix the mind on, with a view to a careful examination;
      to think on with care; to ponder; to study; to meditate
      on.
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            I will consider thy testimonies.      --Ps. cxix.
                                                  95.
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            Thenceforth to speculations high or deep
            I turned my thoughts, and with capacious mind
            Considered all things visible.        --Milton.
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   2. To look at attentively; to observe; to examine.
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            She considereth a field, and buyeth it. --Prov.
                                                  xxxi. 16.
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   3. To have regard to; to take into view or account; to pay
      due attention to; to respect.
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            Consider, sir, the chance of war: the day
            Was yours by accident.                --Shak.
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            England could grow into a posture of being more
            united at home, and more considered abroad. --Sir W.
                                                  Temple.
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   4. To estimate; to think; to regard; to view.
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            Considered as plays, his works are absurd.
                                                  --Macaulay.
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   Note: The proper sense of consider is often blended with an
         idea of the result of considering; as, "Blessed is he
         that considereth the poor." --Ps. xli. 1.; i.e.,
         considers with sympathy and pity. "Which [services] if
         I have not enough considered." --Shak.; i.e., requited
         as the sufficient considering of them would suggest.
         "Consider him liberally." --J. Hooker.

   Syn: To ponder; weigh; revolve; study; reflect or meditate
        on; contemplate; examine. See Ponder.
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The Collaborative International Dictionary of English v.0.48:

Consider \Con*sid"er\, v. i.
   1. To think seriously; to make examination; to reflect; to
      deliberate.
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            We will consider of your suit.        --Shak.
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            'T were to consider too curiously, to consider so.
                                                  --Shak.
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            She wished she had taken a moment to consider,
            before rushing down stairs.           --W. Black
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   2. To hesitate. [Poetic & R.] --Dryden.
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WordNet (r) 3.0 (2006):

consider
    v 1: deem to be; "She views this quite differently from me"; "I
         consider her to be shallow"; "I don't see the situation
         quite as negatively as you do" [syn: see, consider,
         reckon, view, regard]
    2: give careful consideration to; "consider the possibility of
       moving" [syn: study, consider]
    3: take into consideration for exemplifying purposes; "Take the
       case of China"; "Consider the following case" [syn:
       consider, take, deal, look at]
    4: show consideration for; take into account; "You must consider
       her age"; "The judge considered the offender's youth and was
       lenient" [syn: consider, count, weigh]
    5: think about carefully; weigh; "They considered the
       possibility of a strike"; "Turn the proposal over in your
       mind" [syn: consider, debate, moot, turn over,
       deliberate]
    6: judge or regard; look upon; judge; "I think he is very
       smart"; "I believe her to be very smart"; "I think that he is
       her boyfriend"; "The racist conceives such people to be
       inferior" [syn: think, believe, consider, conceive]
    7: look at attentively [syn: regard, consider]
    8: look at carefully; study mentally; "view a problem" [syn:
       view, consider, look at]
    9: regard or treat with consideration, respect, and esteem;
       "Please consider your family"

Moby Thesaurus II by Grady Ward, 1.0:

184 Moby Thesaurus words for "consider":
   account, account as, adjudge, adjudicate, admit, admit exceptions,
   air, allow, allow for, analyze, assume, be abstracted, be afraid,
   be concerned, be judicious, be thoughtful of, bear in mind,
   believe, brood, canvass, care, chew over, chew the cud, cogitate,
   comment upon, concede, conceive, conclude,
   consider the circumstances, consider the source, contemplate,
   controvert, count, credit, daresay, deal with, debate, deduce,
   deem, deliberate, deliberate over, deliberate upon, digest,
   discount, discourse about, discuss, disregard, divine, dream,
   entertain thoughts of, envisage, envision, esteem, estimate,
   examine, exchange views, excogitate, exercise judgment, expect,
   express an opinion, eye, fancy, feel, form an opinion, gather,
   gauge, go into, grant, guess, handle, harbor an idea, have a hunch,
   have an idea, have an impression, have an inkling, have in mind,
   have regard for, have the idea, have thoughts about, heed, hold,
   hold an idea, hold as, hold the thought, imagine, infer, inspect,
   introspect, investigate, judge, keep in mind, knock around, let,
   let be, lift temporarily, look at, look upon, look upon as,
   maintain, make allowance for, mark, meditate, mind, mull over,
   muse, new, note, observe, opine, pass under review, pay attention,
   perpend, pine, play around with, play with, ponder, prefigure,
   presume, presuppose, presurmise, provide for, provisionally accept,
   rap, rate, reason, reason about, reason the point, reck, reckon,
   reckon with, reflect, reflect upon, regard, relax,
   relax the condition, repute, respect, review, revolve, rule,
   ruminate, ruminate over, say, scan, scrutinize, see, sense,
   set aside, set down as, sift, speculate, study, suppose, surmise,
   suspect, take, take account of, take an interest, take for,
   take for granted, take into account, take into consideration,
   take it, take to be, take up, talk, talk about, talk of, talk over,
   think, think about, think of, think over, thresh out, toy with,
   treat, trow, understand, ventilate, view, view as, waive, ween,
   weigh