- present participle of bleach.
bleaching
Americannoun
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the application of bleach or another chemical agent to something in order to whiten, lighten, clean, or disinfect.
Bleaching is not recommended for this fabric.
She gives her kitchen countertops a weekly bleaching.
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the process of becoming whiter or lighter in color, such as by prolonged exposure to sunlight, the application of chemicals, or other means.
The bleaching of animal bones in the desert is a well-known phenomenon.
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a loss of color in coral that indicates declining health: caused by a loss of the algae that normally live symbiotically in the coral's tissues.
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Photography. the conversion of the silver image of a negative or print to a silver halide, either to remove the image or to change its tone.
Etymology
Origin of bleaching
First recorded in 1550–60, bleaching for def. 1; 1970–75, bleaching for def. 3; bleach ( def. ) + -ing 1 ( def. )
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Scientists have already connected them with widespread coral bleaching, large-scale deaths of marine organisms, harmful algal blooms and major disruptions to fisheries and aquaculture.
From Science Daily ● Aug. 11, 2026
By manipulating each tank's temperature and pH levels, scientists can simulate future heatwaves and induce coral bleaching to see how fish and other organisms adapt.
From Barron's ● Jul. 29, 2026
Wildfires, floods, melting ice caps, heat waves, the bleaching of ocean reefs.
From Los Angeles Times ● Jun. 18, 2026
Nolasco said a taper is the favorite haircut these days and there’s also players bleaching their hair blond for the playoffs.
From Los Angeles Times ● May 23, 2026
When I drift away from the fire to find a place to throw down my sleeping bag, the first faint smear of dawn is already bleaching the rim of the northeastern sky.
From "Into the Wild" by Jon Krakauer
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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.