The Collaborative International Dictionary of English v.0.48:

Reject \Re*ject"\ (r?-j?kt"), v. t. [imp. & p. p. Rejected; p.
   pr. & vb. n. Rejecting.] [L. rejectus, p. p. of reicere,
   rejicere; pref. re- re- + jacere to throw: cf. F. rejeter,
   formerly also spelt rejecter. See Jet a shooting forth.]
   1. To cast from one; to throw away; to discard.
      [1913 Webster]

            Therefore all this exercise of hunting . . . the
            Utopians have rejected to their butchers. --Robynson
                                                  (More's
                                                  Utopia).
      [1913 Webster]

            Reject me not from among thy children. --Wisdom ix.
                                                  4.
      [1913 Webster]

   2. To refuse to receive or to acknowledge; to decline
      haughtily or harshly; to repudiate.
      [1913 Webster]

            That golden scepter which thou didst reject.
                                                  --Milton.
      [1913 Webster]

            Because thou hast rejected knowledge, I will also
            reject thee, that thou shalt be no priest to me.
                                                  --Hos. iv. 6.
      [1913 Webster]

   3. To refuse to grant; as, to reject a prayer or request.
      [1913 Webster]

   Syn: To repel; renounce; discard; rebuff; refuse; decline.
        [1913 Webster]

WordNet (r) 3.0 (2006):

reject
    n 1: the person or thing that is rejected or set aside as
         inferior in quality [syn: cull, reject]
    v 1: refuse to accept or acknowledge; "I reject the idea of
         starting a war"; "The journal rejected the student's paper"
         [ant: accept]
    2: refuse to accept; "He refused my offer of hospitality" [syn:
       refuse, reject, pass up, turn down, decline] [ant:
       accept, have, take]
    3: deem wrong or inappropriate; "I disapprove of her child
       rearing methods" [syn: disapprove, reject] [ant: O.K.,
       approve, okay, sanction]
    4: reject with contempt; "She spurned his advances" [syn:
       reject, spurn, freeze off, scorn, pooh-pooh,
       disdain, turn down]
    5: resist immunologically the introduction of some foreign
       tissue or organ; "His body rejected the liver of the donor"
       [syn: resist, reject, refuse]
    6: refuse entrance or membership; "They turned away hundreds of
       fans"; "Black people were often rejected by country clubs"
       [syn: reject, turn down, turn away, refuse] [ant:
       admit, allow in, intromit, let in]
    7: dismiss from consideration or a contest; "John was ruled out
       as a possible suspect because he had a strong alibi"; "This
       possibility can be eliminated from our consideration" [syn:
       rule out, eliminate, winnow out, reject]

Moby Thesaurus II by Grady Ward, 1.0:

246 Moby Thesaurus words for "reject":
   abandon, abjure, ban, bar, bar out, barf, be contrary to,
   be seasick, be sick, be skeptical, be unmoved, be unwilling,
   beg off, belie, blackball, blockade, boot out, bounce, bring up,
   brush aside, call into question, cashier, cast, cast aside,
   cast away, cast off, cast out, cast-off, castaway, castoff,
   categorically reject, challenge, chuck, chuck out, chuck up,
   contemn, contest, contradict, contravene, controvert, count out,
   cross, cut off, debar, decline, decline to accept, deep six,
   deep-six, defenestrate, deny, derelict, despise, detrude, disagree,
   disallow, disapprove, disapprove of, disbelieve, discard,
   discarding, discharge, disclaim, discount, discredit, disdain,
   disfavor, disgorge, dismiss, disown, disposal, dispose of,
   disregard, dissent, dissent from, ditch, dogie, drop, dump,
   dumping, egest, eighty-six, eject, eliminate, elimination, embargo,
   enjoin, except, exclude, exclude from, expel, extrude,
   feed the fish, flotsam, flotsam and jetsam, forbid, forswear,
   foundling, freeze out, frown at, frown down, frown upon, gag,
   gag on, gainsay, get quit of, get rid of, get shut of, give away,
   give the hook, grimace at, heave, heave out, heave the gorge,
   hold out against, ignore, inhibit, interdict, irregular, jetsam,
   jettison, jilt, junk, junking, keck, keep out, kick downstairs,
   kick out, lagan, leave out, lock out, look askance at,
   look black upon, misbelieve, negate, negative, not accept,
   not admit, not approve, not believe, not buy, not consent,
   not fall for, not go for, not hear of, not hold with, not swallow,
   not think of, object, object to, obtrude, omit, oppose, oppugn,
   orphan, ostracize, oust, outlaw, part with, pass by, pass over,
   pass up, preclude, prevent, prohibit, proscribe, protest, puke,
   push aside, put out, rebuff, rebut, recant, refuse, refuse consent,
   refuse to admit, refuse to believe, refuse to consider,
   refuse to credit, regurgitate, rejectamenta, rejection, relegate,
   removal, remove, renounce, repel, repress, reprobate, repudiate,
   repulse, resist believing, resist entreaty, resist persuasion,
   retch, rubbish, rule out, say nay, say no, say no to, scout, scrap,
   scrapping, scratch, second, send to Coventry, set aside, shed,
   shove away, shun, shut out, sick up, slough, spew, spurn,
   stand aloof, suppress, taboo, take exception to, think ill of,
   think little of, throw away, throw out, throw over,
   throw overboard, throw up, throwaway, thrust out, thumb down,
   toss out, toss overboard, trash, traverse, turn away, turn down,
   turn out, unbelieve, upchuck, veto, view with disfavor, vomit,
   vote nay, vote negatively, waif, waifs and strays, waive,
   wastrel