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Noun: water vapour
Usage: Brit, Cdn (US: water vapor)
  1. Water in a vaporous form diffused in the atmosphere but below boiling temperature
    "The high humidity was due to excessive water vapour in the air";
    - water vapor [US]

Derived forms: water vapours

Type of: vapor [US], vapour [Brit, Cdn]

Part of: cloud

Encyclopedia: Water vapour