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sunfast

[ suhn-fast, -fahst ]
/ ˈsʌnˌfæst, -ˌfɑst /
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adjective
not subject to fading in sunlight, as a dye, fabric, or garment.
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Origin of sunfast

First recorded in 1925–30; sun + fast1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

British Dictionary definitions for sunfast

sunfast
/ (ˈsʌnˌfɑːst) /

adjective
mainly US and Canadian not fading in sunlight
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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