The Collaborative International Dictionary of English v.0.48:

Discuss \Dis*cuss"\, v. t. [imp. & p. p. Discussed; p. pr. &
   vb. n. Discussing.] [L. discussus, p. p. of discutere to
   strike asunder (hence came the sense to separate mentally,
   distinguish); dis- + quatere to shake, strike. See Quash.]
   1. To break to pieces; to shatter. [Obs.] --Sir T. Browne.
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   2. To break up; to disperse; to scatter; to dissipate; to
      drive away; -- said especially of tumors. [archaic]

   Note: This usage is preserved only in the word discussive.
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               Many arts were used to discuss the beginnings of
               new affection.                     --Sir H.
                                                  Wotton.
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               A pomade . . . of virtue to discuss pimples.
                                                  --Rambler.
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   3. To shake; to put away; to finish. [Obs.]
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            All regard of shame she had discussed. --Spenser.
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   4. To examine in detail or by disputation; to reason upon by
      presenting favorable and adverse considerations; to
      debate; to sift; to investigate; to ventilate. "We sat and
      . . . discussed the farm . . . and the price of grain."
      --Tennyson. "To discuss questions of taste." --Macaulay.
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   5. To deal with, in eating or drinking. [Colloq.]
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            We sat quietly down and discussed a cold fowl that
            we had brought with us.               --Sir S.
                                                  Baker.
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   6. (Law) To examine or search thoroughly; to exhaust a remedy
      against, as against a principal debtor before proceeding
      against the surety. --Burrill.

   Syn: To Discuss, Examine, Debate. We speak of examining
        a subject when we ponder it with care, in order to
        discover its real state, or the truth respecting it. We
        speak of discussing a topic when we examine it
        thoroughly in its distinct parts. The word is very
        commonly applied to matters of opinion. We may discuss a
        subject without giving in an adhesion to any conclusion.
        We speak of debating a point when we examine it in
        mutual argumentation between opposing parties. In debate
        we contend for or against some conclusion or view.
        [1913 Webster]

WordNet (r) 3.0 (2006):

discuss
    v 1: to consider or examine in speech or writing; "The author
         talks about the different aspects of this question"; "The
         class discussed Dante's `Inferno'" [syn: discourse, talk
         about, discuss]
    2: speak with others about (something); talk (something) over in
       detail; have a discussion; "We discussed our household
       budget" [syn: hash out, discuss, talk over]

Moby Thesaurus II by Grady Ward, 1.0:

79 Moby Thesaurus words for "discuss":
   advise with, agitate, air, analyze, argue, bargain, call in,
   canvass, collogue, comment upon, compare notes, confer,
   confer with, consider, consult, consult with, controvert, counsel,
   criticize, deal with, debate, deliberate, deliberate over,
   deliberate upon, descant, discept, discourse, discourse about,
   discuss with, dispute, dissert, dissertate, examine,
   exchange observations, exchange views, go into, handle,
   have conversations, hold conference, inquire into, interpret,
   investigate, knock around, moot, negotiate, palaver, parley,
   pass under review, powwow, pro and con, put heads together, rap,
   reason, reason about, reason the point, reason with, refer to,
   remark upon, review, sift, sit down together, sit down with, study,
   survey, take counsel, take up, take up with, talk, talk about,
   talk of, talk over, thrash out, thresh out, toss, touch upon,
   treat, treat of, ventilate, write up