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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