VAPOUR definition: 1. gas or extremely small drops of liquid that result from the heating of a liquid or solid: 2. a…. Learn more.

One of the most important is a measure of how much moisture the atmosphere can extract from the land, known as the "vapour pressure deficit".

Definition of vapour noun from the Oxford Advanced Learner's Dictionary. a mass of very small drops of liquid in the air, for example steam. The particles then form a vapour. There was a …

Vapor pressure is measured in the standard units of pressure. The International System of Units (SI) recognizes pressure as a derived unit with the dimension of force per area and designates …

Vapour consists of tiny drops of water or other liquids in the air, which appear as mist. ...water vapour.

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2. mist, fumes or smoke in the air. Near the marshes the air was filled with a strange-smelling vapour. vapor

There are nine meanings listed in OED's entry for the noun vapour, one of which is labelled obsolete. See ‘Meaning & use’ for definitions, usage, and quotation evidence.

The meaning of VAPOUR is chiefly British spelling of vapor.

Vapour refers to the gaseous state of a substance that is typically liquid or solid at room temperature. It is formed when a liquid evaporates or a solid sublimates.