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1. The gaseous state of a substance that is liquid or solid at room temperature.
2. A faintly visible suspension of fine particles of matter in the air, as mist, fumes, or smoke.
3. A mixture of fine droplets of a substance and air, as the fuel mixture of an internal-combustion engine.
4. Archaic
a. Something insubstantial, worthless, or fleeting.
b. A fantastic or foolish idea.
5. vapors Archaic
a. Exhalations within a bodily organ, especially the stomach, supposed to affect the mental or physical condition. Used with the.
b. A nervous disorder such as depression or hysteria. Used with the.
v. va·pored, va·por·ing, va·pors
1. To fill or cover with vapor: Perfume vapored the room.
2. To vaporize: "You wished you'd seen one of the monster shots that vapored an atoll way back when" (Don DeLillo).
1. To give off vapor.
2. To evaporate: The fog vapored away.
3. To engage in idle, boastful talk: vapored on about his accomplishments.

[Middle English vapour, from Anglo-Norman, from Latin vapor.]

va′por·er n.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.vaporing - an instance of boastful talkvaporing - an instance of boastful talk; "his brag is worse than his fight"; "whenever he won we were exposed to his gasconade"
boast, boasting, jactitation, self-praise - speaking of yourself in superlatives
References in classic literature ?
He was frighted even to the marrow, and was minded to give order for your instant enlargement, and that you be clothed in fine raiment and lodged as befitted one so great; but then came Merlin and spoiled all; for he persuaded the king that you are mad, and know not whereof you speak; and said your threat is but foolish- ness and idle vaporing.
On the following morning, Captain Bonneville purchased a supply of buffalo meat from his braggadocio friends; who, with all their vaporing, were in fact a very forlorn horde, destitute of firearms, and of almost everything that constitutes riches in savage life.
Swearing is the safety-valve through which the bad temper that might otherwise do serious internal injury to his mental mechanism escapes in harmless vaporing.