lightfast

adjective
light·​fast | \ ˈlīt-ˌfast How to pronounce lightfast (audio) \

Definition of lightfast

: resistant to light and especially to sunlight especially : colorfast to light

Other Words from lightfast

lightfastness \ ˈlīt-​ˌfas(t)-​nəs How to pronounce lightfastness (audio) \ noun

First Known Use of lightfast

1950, in the meaning defined above

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The first known use of lightfast was in 1950

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Cite this Entry

“Lightfast.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/lightfast. Accessed 1 Dec. 2020.

More from Merriam-Webster on lightfast

Britannica English: Translation of lightfast for Arabic Speakers

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