Dictionary.com

lightproof

[ lahyt-proof ]
/ ˈlaɪtˌpruf /

adjective

impervious to light: a lightproof film cartridge.

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Question 1 of 9
You may have read the word "simmer" in a recipe or two, but what does it really mean?
To cook in water that begins cold and then reaches a boil.
To stew in a sauce for a long time.
To cook in water, just below boiling temperature.
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Origin of lightproof

First recorded in 1920–25; light1 + -proof

Words nearby lightproof

light out, light pen, light pipe, lightplane, light pollution, lightproof, light quantum, light-rail, light reaction, light reflex, lights
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for lightproof

  • This incredible blackness made a lightproof wall for the recessed hollow at the foot of the cliff.

    Planet of the Damned|Harry Harrison