• (obsolete) Wind; flatulence.
  • (dated) Any medicinal agent designed for administration in the form of inhaled vapour.
  • The gaseous state of a substance that is normally a solid or liquid.
  • (archaic) Hypochondria; melancholy; the blues; hysteria, or other nervous disorder.
  • Cloudy diffused matter such as mist, steam or fumes suspended in the air.
  • Something unsubstantial, fleeting, or transitory; unreal fancy; vain imagination; idle talk; boasting.


  • (intransitive) To use insubstantial language; to boast or bluster.
  • (transitive) To turn into vapour.

    "to vapour away a heated fluid"

  • (intransitive) To become vapour; to be emitted or circulated as vapour.
  • To emit vapour or fumes.

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