lightproof

[lahyt-proof]

adjective

1. impervious to light: lights.

   a lightproof film cartridge.

Word History and Origins

Origin of lightproof¹

First recorded in 1920–25; light ¹ + -proof

Example Sentences

Under infrared light, LaBossiere moved the rolls of film into lightproof drums.

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“I suspect that those wars to come will be made horrible beyond my conception by new poison gases, inextinguishable flames and lightproof smoke clouds,” he wrote.

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To lightproof the bedroom, “blackout window treatments are a must,” said Greg Roth, a designer at Home Front Build in Los Angeles, by email.

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For his signature piece, “Sungazing” — which has been shown in several major cities — he used a simple lightproof box as a camera and photosensitive paper as film.

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That’s pretty amazing, considering that the space was never designed to be lightproof.

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