lightproof

adjective

light·​proof ˈlīt-ˌprüf How to pronounce lightproof (audio)
: impenetrable by light

Word History

First Known Use

circa 1788, in the meaning defined above

Time Traveler
The first known use of lightproof was circa 1788

Dictionary Entries Near lightproof

Cite this Entry

“Lightproof.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/lightproof. Accessed 28 Mar. 2024.

Kids Definition

lightproof

adjective
light·​proof ˈlīt-ˈprüf How to pronounce lightproof (audio)
: not letting in light

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