The Collaborative International Dictionary of English v.0.48:

Concede \Con*cede"\ (k[o^]n*s[=e]d"), v. t. [imp. & p. p.
   Conceded; p. pr. & vb. n. Conceding.] [L. concedere,
   concessum; con- + cedere to go along, give way, yield: cf. F.
   conc['e]der. See Cede.]
   1. To yield or suffer; to surrender; to grant; as, to concede
      the point in question. --Boyle.
      [1913 Webster]

   2. To grant, as a right or privilege; to make concession of.
      [1913 Webster]

   3. To admit to be true; to acknowledge.
      [1913 Webster]

            We concede that their citizens were those who lived
            under different forms.                --Burke.

   Syn: To grant; allow; admit; yield; surrender.
        [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Concede \Con*cede"\, v. i.
   To yield or make concession.
   [1913 Webster]

         I wished you to concede to America, at a time when she
         prayed concession at our feet.           --Burke.
   [1913 Webster]

WordNet (r) 3.0 (2006):

concede
    v 1: admit (to a wrongdoing); "She confessed that she had taken
         the money" [syn: concede, profess, confess]
    2: be willing to concede; "I grant you this much" [syn:
       concede, yield, grant]
    3: give over; surrender or relinquish to the physical control of
       another [syn: concede, yield, cede, grant]
    4: acknowledge defeat; "The candidate conceded after enough
       votes had come in to show that he would lose"

Moby Thesaurus II by Grady Ward, 1.0:

56 Moby Thesaurus words for "concede":
   abandon, accept, accord, acknowledge, admit, admit everything,
   admit exceptions, agree provisionally, allow, allow for,
   assent grudgingly, avow, award, cede, come clean, confess,
   consider, consider the circumstances, consider the source,
   cop a plea, discount, disregard, express general agreement,
   give up, go along with, grant, let on, lift temporarily,
   make allowance for, not oppose, open up, out with it, own, own up,
   plead guilty, provide for, recognize, relax, relax the condition,
   relinquish, resign, set aside, spill, spill it, spit it out,
   submit, surrender, take account of, take into account,
   take into consideration, tell all, tell the truth, vouchsafe,
   waive, warrant, yield