Vapor — Any substance in the gaseous, or aeriform, state, the condition of which is ordinarily that of a liquid or solid.
Vapor — In a loose and popular sense, any visible diffused substance floating in the atmosphere and impairing its transparency, as smoke, fog, etc.
Vapor — Wind; flatulence.
Vapor — Something unsubstantial, fleeting, or transitory; unreal fancy; vain imagination; idle talk; boasting.
Vapor — An old name for hypochondria, or melancholy; the blues.
Vapor — A medicinal agent designed for administration in the form of inhaled vapor.
Vapor — To pass off in fumes, or as a moist, floating substance, whether visible or invisible, to steam; to be exhaled; to evaporate.
Vapor — To emit vapor or fumes.
Vapor — To talk idly; to boast or vaunt; to brag.
Vapor — To send off in vapor, or as if in vapor; as, to vapor away a heated fluid.
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