Definitions of vapor

  1. To send off in vapor, or as if in vapor; as, to vapor away a heated fluid.
  2. To pass off in the form of gas, steam, etc,; to send out gas, steam, etc,; to indulge in idle talk.
  3. To pass off in vapor: to evaporate: to boast: to brag.
  4. Any substance in the gaseous, or aeriform, state, the condition of which is ordinarily that of a liquid or solid.
  5. In a loose and popular sense, any visible diffused substance floating in the atmosphere and impairing its transparency, as smoke, fog, etc.
  6. Wind; flatulence.
  7. Something unsubstantial, fleeting, or transitory; unreal fancy; vain imagination; idle talk; boasting.
  8. A medicinal agent designed for administration in the form of inhaled vapor.
  9. To pass off in fumes, or as a moist, floating substance, whether visible or invisible, to steam; to be exhaled; to evaporate.
  10. To emit vapor or fumes.
  11. To talk idly; to boast or vaunt; to brag.
  12. The form taken by liquids and solids under the influence of heat, or reduction of pressure; gas; a cloudlike substance floating in the air and robbing it of clearness, as fog, smoke, etc.; anything impossible to seize and hold; something that vanishes like smoke or mist; as, life is but a vapor.
  13. The gas, generally invisible, into which most liquids and solids are convertible by heat: ( physics) the condition of a body when it becomes gas by heat: water in the atmosphere: anything vain or transitory:- pl. a disease of nervous weakness in which a variety of strange images float before the mind.
  14. A body rendered gaseous by heat; steam; mist; exhalation.
  15. Floating moisture in the air; the gaseous form of any substance.
  16. Something fleeting and unsubstantial. vapour.