air door

English

Noun

air door (plural air doors)

  1. A device used to prevent air, contaminants, or flying insects from moving from one open space to another.
    Synonym: air curtain
  2. An air-operated door, using compressed air to open and close it.
    • 1958 August, T. S. Lascelles, “Diamond Jubilee of the Waterloo & City Railway”, in Railway Magazine, page 524:
      The vehicles had roller bearings, electro-pneumatic control, automatic acceleration, and air doors, and were much welcomed by the public.

Further reading

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