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.

From Seattle Times

“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.

From Washington Post

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

From Washington Post

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.

From Washington Post

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

From Washington Post