lightfast

play
adjective light·fast \ˈlīt-ˌfast\

Definition of lightfast

  1. :  resistant to light and especially to sunlight; especially :  colorfast to light

lightfastness

play \ˈlīt-ˌfas(t)-nəs\ noun

1950

First Known Use of lightfast

1950


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capable of being understood in two ways

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