Greek Dictionary 3

G2745 καύχημα kauchēma kow’-khay-mah From G2744; a boast (properly the objective; by implication the act) in a good or bad sense:—boasting, (whereof) to glory (of), glorying, rejoice (-ing).

NET: 1) that of which one glories or can glory, matter or ground of glorying 2) a glorying or boasting