lightfast

adjective
light·​fast | \ˈlīt-ˌfast \

Definition of lightfast 

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

Other Words from lightfast

lightfastness \ˈlīt-​ˌfas(t)-​nəs \ 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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Britannica English: Translation of lightfast for Arabic Speakers

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