Boast (�), v. i. [imp. & p. p.Boasted; p. pr. & vb. n.Boasting.] [OE. bosten, boosten, v., bost, boost, n., noise, boasting; cf. G. bausen, bauschen, to swell, pusten, Dan. puste, Sw. pusta, to blow, Sw. pösa to swell; or W. bostio to boast, bost boast, Gael. bosd. But these last may be from English.] 1. To vaunt one's self; to brag; to say or tell things which are intended to give others a high opinion of one's self or of things belonging to one's self; as, to boast of one's exploits courage, descent, wealth.
By grace are ye saved through faith; and that not of yourselves:.. not of works, lest any man should boast.
Eph. ii. 8, 9.
2. To speak in exulting language of another; to glory; to exult.
In God we boast all the day long.
Ps. xliv. 8
Syn. — To brag; bluster; vapor; crow; talk big.