From 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]
From The Collaborative International Dictionary of English v.0.48:
conceded \conceded\ adj. prenom.
acknowledged. Opposite of unacknowledged.
Syn: admitted(prenominal), avowed(prenominal),
confessed(prenominal), self-confessed(prenominal).
[WordNet 1.5 +PJC]