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lightfast

[ lahyt-fast, -fahst ]

adjective

  1. not affected or faded by light, lights, especially sunlight; colorfast when exposed to light. lights.


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Other Words From

  • lightfastness noun
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Word History and Origins

Origin of lightfast1

First recorded in 1955–60; light 1 + fast 1
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Example Sentences

Ironically, the red paint made decades ago was relatively lightfast, because the color came from iron oxide, which keeps its color in the sun just as red, iron-rich soil found in some parts of the country does.

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