yellow out
C1 neutral inseparable intransitive
In simple words
To turn completely yellow over time, like old paper or old photographs do.
Literal meaning: To become yellow throughout — transparent.
Meanings
1 C1 neutral
To become extensively or completely yellow through aging, oxidation, or prolonged exposure to light.
"The vintage posters had yellowed out after years hanging in a sunlit corridor."
Grammar: inseparable
Usage notes
Rare and specialist. Used in photography, printing, conservation, and materials contexts. Not common in everyday speech. The related noun 'yellowing out' can appear in technical descriptions.
Commonly used with
pages photographs paper paint plastic newspaper
Forms
Base
yellow out
I/you/we/they
3rd person
yellows out
he/she/it
Past simple
yellowed out
yesterday
Past participle
yellowed out
have + pp
-ing form
yellowing out
continuous
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