sunfast

American

[suhn-fast, -fahst] / ˈsʌnˌfæst, -ˌfɑst /

adjective

not subject to fading in sunlight, as a dye, fabric, or garment.

sunfast British

/ ˈsʌnˌfɑːst /

adjective

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

Etymology

Origin of sunfast

First recorded in 1925–30; sun + fast ¹

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023