follow Dictionary.com

8 Words That Are Older Than You Think

lightfast

[lahyt-fast, -fahst] /ˈlaɪtˌfæst, -ˌfɑst/
adjective
1.
not affected or faded by light, especially sunlight; colorfast when exposed to light.
Origin
1955-1960
1955-60; light1 + fast1
Related forms
lightfastness, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source
British Dictionary definitions for light-fast

light-fast

adjective
1.
(of a dye or dyed article) unaffected by light
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
Cite This Source

Word of the Day

Word Value for light

9
10
Scrabble Words With Friends

Quotes with light-fast