vapor

The gaseous state of a substance that is liquid or solid at room temperature.

A faintly visible suspension of fine particles of matter in the air, as mist, fumes, or smoke.

A mixture of fine droplets of a substance and air, as the fuel mixture of an internal-combustion engine.

Something insubstantial, worthless, or fleeting.

A fantastic or foolish idea.

Exhalations within a bodily organ, especially the stomach, supposed to affect the mental or physical condition. Used with the.

A nervous disorder such as depression or hysteria. Used with the.

To fill or cover with vapor.