Webster's Revised Unabridged Dictionary · 1913

Boast

Boast ({not transcribed}) , intransitive verb

[Old English bosten, boosten, v., bost, boost, n., noise, boasting; compare German bausen, bauschen, to swell, pusten, Danish puste, Swedish pusta, to blow, Swedish posa to swell; or Welsh 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. — Bible (KJV) - Psalm xliv. 8

Boast , transitive verb

1.
To display in ostentatious language; to speak of with pride, vanity, or exultation, with a view to self-commendation; to extol.
Lest bad men should boast Their specious deeds. — Milton
2.
To display vaingloriously.
3.
To possess or have; as, to boast a name.
Boast not thyself of to-morrow. — Bible (KJV) - Proverb xxvii. 1
Collocations (1)
To boast one's self , to speak with unbecoming confidence in, and approval of, one's self; -- followed by of and the thing to which the boasting relates. [Archaic]

Boast , transitive verb

[Of uncertain etymology.]

1.
(Masonry) To dress, as a stone, with a broad chisel. — Weale
2.
(Sculpture) To shape roughly as a preparation for the finer work to follow; to cut to the general form required.

Boast , noun

1.
Act of boasting; vaunting or bragging.
Reason and morals? and where live they most, In Christian comfort, or in Stoic boast! — Byron
2.
The cause of boasting; occasion of pride or exultation, -- sometimes of laudable pride or exultation.
The boast of historians. — Macaulay