/ Dictionary / Index V vapor: Meaning and Definition of Find definitions for: va•por Pronunciation: (vā'pur), [key] —v.t. to cause to rise or pass off in, or as if in, vapor; vaporize. to affect with vapors; depress. —v.i. to rise or pass off in the form of vapor. to emit vapor or exhalations. to talk or act grandiloquently, pompously, or boastfully; bluster. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: vapor (Thesaurus) vapid vapor barrier Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language