vapor

n. steam, mist

v. change into vapor, evaporate; boast

Vapor or vapour (see spelling differences) is the gas phase component of another state of matter (e.g. liquid or solid) which does not completely fill its container. It is distinguished from the pure gas phase by the presence of the same substance in another state of matter. Hence when a liquid has completely evaporated, it is said that the system has been completely transformed to the gas phase.
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n. steam, vapor

n. blur; fume, reek; steam, vapor

(v. t.)
To send off in vapor, or as if in vapor; as, to vapor away a heated fluid.
  

(n.)
Wind; flatulence.
  

(n.)
To talk idly; to boast or vaunt; to brag.
  

(n.)
To pass off in fumes, or as a moist, floating substance, whether visible or invisible, to steam; to be exhaled; to evaporate.
  

(n.)
To emit vapor or fumes.
  

(n.)
Something unsubstantial, fleeting, or transitory; unreal fancy; vain imagination; idle talk; boasting.
  

(n.)
In a loose and popular sense, any visible diffused substance floating in the atmosphere and impairing its transparency, as smoke, fog, etc.
  

(n.)
Any substance in the gaseous, or aeriform, state, the condition of which is ordinarily that of a liquid or solid.
  

(n.)
An old name for hypochondria, or melancholy; the blues.
  

(n.)
A medicinal agent designed for administration in the form of inhaled vapor.