vapour or (esp US) vapor /vāˈpər/

1. A substance in the form of a mist, fume, or smoke, esp one coming off from a solid or liquid
2. A gas below its critical temperature, liquefiable by pressure
3. Water in the atmosphere
4. (in pl) exhalations supposed to arise in the stomach or elsewhere in the body, affecting the health (old medicine)
5. (in pl, usu with the) low spirits, boredom, nervous disorder
6. Anything insubstantial, vain, or transitory
7. A fanciful notion
8. A boast

1. To pass off in vapour
2. To emit vapour
3. To evaporate
4. To brag, make empty boasts
5. To swagger, show off

1. To convert into vapour
2. To affect with the vapours
3. To boast
4. To drive (away) by bluster

vāˈporable adjective

Capable of being turned to vapour

vāporifˈic adjective

Vaporizing

vāˈporiform adjective

Existing in the form of vapour

vāporimˈeter noun

An instrument for measuring vapour pressure or vapour

vāporīzˈable or vāporīsˈable adjective

vāporizāˈtion or vāporisāˈtion noun

vāˈporize or vāˈporise transitive verb

1. To convert into vapour
2. To make disappear suddenly
3. To spray
4. To obliterate (informal)

To become vapour

vāporīz'er or vāporīs'er noun

An apparatus for discharging liquid in a fine spray

vāporosˈity noun

vāˈporous adjective

1. Of, in the form of, like, or full of vapour
2. Vain
3. Affected with the vapours
4. Insubstantial
5. Flimsy
6. Vainly fanciful

vāˈporously adverb

vāˈporousness noun

vāˈpoured adjective

1. Full of vapours
2. Affected with the vapours

vāˈpourer noun

1. A person who vapours
2. A moth (genus Orgyia) of the tussock family

vāˈpouring noun and adjective

vāˈpouringly adverb

vāˈpourish adjective

Vapoury

vāˈpourishness noun

vāˈpoury adjective

1. Full of vapour
2. Affected with the vapours

vaˈpour-bath noun

1. A bath in vapour
2. A place or apparatus for the purpose

vapour density noun

The density of a gas or vapour relative to that of hydrogen at the same temperature and pressure

vapour lock noun (engineering)

The formation of vapour in a pipe carrying a volatile fluid, resulting in an interruption of the flow

vapour pressure noun

The pressure exerted by a vapour in contact with its liquid or solid form

vapour trail noun

A white trail of condensed vapour left by high-flying aircraft (also US contrail)

vaˈpourware or (esp US) vaˈporware noun (comput sl)

Software or hardware that is loudly heralded but not yet (and possibly never to be) available

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