[va.por] n [ME vapour, fr. MF vapeur, fr. L vapor steam, vapor] (14c) 1: diffused matter (as smoke or fog) suspended floating in the air and impairing its transparency
2. a: a substance in the gaseous state as distinguished from the liquid or solid state b: a substance (as gasoline, alcohol, mercury, or benzoin) vaporized for industrial, therapeutic, or military uses; also: a mixture (as the explosive mixture in an internal combustion engine) of such a vapor with air 3 a: something unsubstantial or transitory: phantasm b: a foolish or fanciful idea
4. pl a archaic: exhalations of bodily organs (as the stomach) held to affect the physical or mental condition b: a depressed or hysterical nervous condition
[2]vapor vi va.pored ; va.por.ing (15c) 1 a: to rise or pass off in vapor b: to emit vapor
2: to indulge in bragging, blustering, or idle talk -- va.por.er n