BarnDoor definitions

Barndoor

1) Flap
Found on https://www.crosswordclues.com/clue/barndoor

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Barndoor

Adjustable doors attached to the front of stage lanterns to control the area of light covered by a particular beam. (UK)
Found on http://www.encyclo.co.uk/visitor-contributions.php

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barndoor

[n] - an opaque adjustable flap on a lamp fixture
Found on http://www.webdictionary.co.uk/definition.php?query=barndoor

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Barndoor

When a climber swings away from the rock as a result of being unbalanced.
Found on https://coolofthewild.com/rock-climbing-terms/

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barndoor

noun an opaque adjustable flap on a lamp fixture; used in photography to cut off light from particular areas
Found on https://www.encyclo.co.uk/local/20974

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