I.to come together, meet, πέτραι συγχωροῦσαι the Symplegades, Eur.; συγχωρεῖν λόγοις to meet in argument, id=Eur.
II.to make way, give place, yield or defer to, Lat. concedere, τινί Ar., etc.; Συρηκοσίοισι τῆς ἡγεμονίης συγχ. to make concessions to them about the command, Hdt.; in bad sense, to be in collusion with, connive at, τοῖς πονηροῖς Dem.; ξ. πρός τινας to come to terms with them, Thuc.
2.to accede or agree, assent to, acquiesce in another's opinion, Hdt., attic:—absol. to agree, acquiesce, consent, assent, Soph.; τὸ συγκεχωρηκὸς τῆς εὐσεβείας a yielding, unexacting temper of piety, Dem.
3.c. acc. rei, to concede, give up, yield, Hdt., attic:—Pass., τὰ συγχωρηθέντα χρήματα Dem.
4.to concede or grant in argument, Plat.; c. acc. et inf. to grant that, id=Plat.