vapor

vapor /va·por/ (va´por) pl. vapo´res, vapors   [L.]

1. steam, gas, or exhalation.

2. an atmospheric dispersion of a substance that in its normal state is liquid or solid.

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va·por (vpr)

n.

1. Barely visible or cloudy diffused matter, such as mist, fumes, or smoke, suspended in the air.

2. The state of a substance that exists below its critical temperature and that may be liquefied by application of sufficient pressure.

3. The gaseous state of a substance that is liquid or solid under ordinary conditions.

4. The vaporized form of a medicinal preparation to be administered by inhalation.

5. A mixture of a vapor and air, as an explosive mixture of gasoline and air burned in an internal-combustion engine.

6. vapors Exhalations within an organ, especially the stomach, supposed to affect the mental or physical condition. No longer in technical use.

7. vapors A nervous disorder such as depression or hysteria. No longer in technical use.

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vapor,

n 1. the gaseous form assumed by a solid or liquid when sufficiently heated.
n 2. a visible emanation of fine particles of a liquid.

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vapor

steam, gas or exhalation.