Vapour

usgb/ˈveɪpər/
noun

A substance diffused or suspended in the air, especially one which was originally a liquid or solid turned into a gaseous form.

Water turns into vapour when it is boiled.
Visual representation of "vapour" - A substance diffused or suspended in the air, especially one which was originally a liquid or solid turned into a gaseous form.

Often appears as...

  • water vapour
  • vapour pressure
Definition 1 of 2
Visual representation of "vapour"
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Change of State

The term 'vapour' is used when a substance changes from solid or liquid to gas.

Illustration for Change of State
The boiling kettle released a stream of vapour.
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Visible Gas

'Vapour' often refers to gas that you can see, like steam or fog.

Illustration for Visible Gas
The cold air turned his breath into a vapour.
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Not Always Water

While it's often water, 'vapour' can be any liquid or solid turned gas.

Illustration for Not Always Water
Gasoline vapour can be highly flammable.
Visual representation of the word "Vapour"

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