1. vapor - Noun
2. vapor - Verb
Any substance in the gaseous, or aeriform, state, the condition of which is ordinarily that of a liquid or solid.
In a loose and popular sense, any visible diffused substance floating in the atmosphere and impairing its transparency, as smoke, fog, etc.
Wind; flatulence.
Something unsubstantial, fleeting, or transitory; unreal fancy; vain imagination; idle talk; boasting.
An old name for hypochondria, or melancholy; the blues.
A medicinal agent designed for administration in the form of inhaled vapor.
To pass off in fumes, or as a moist, floating substance, whether visible or invisible, to steam; to be exhaled; to evaporate.
To talk idly; to boast or vaunt; to brag.
To send off in vapor, or as if in vapor; as, to vapor away a heated fluid.
Source: Webster's dictionaryFame is a vapor popularity an accident the only earthly certainty is oblivion. Mark Twain
The theory of interest was wrapped in utter obscurity, until Hume and Smith dispelled the vapor. Jean-Baptiste Say
There are the breezes of early morning; for the sun on emerging from beneath the earth strikes humid air as he returns, and as he goes climbing up the sky he spreads it out before him, extracting breezes from the vapor that was there before the dawn. Vitruvius
This grand show is eternal. It is always sunrise somewhere; the dew is never dried all at once; a shower is forever falling; vapor is ever rising. Eternal sunrise, eternal dawn and gloaming, on sea and continents and islands, each in its turn, as the round earth rolls. John Muir
To condense fact from the vapor of nuance. Neal Stephenson
As when around the clear bright moon, the stars Shine in full splendor, and the winds are hush'd, The groves, the mountain-tops, the headland-heights Stand all apparent, not a vapor streaks The boundless blue, but ether open'd wide All glitters, and the shepherd's heart is cheer'd. William Cowper