per·ox·ide
pə-ˈräk-ˌsīd 
: a compound (such as hydrogen peroxide) in which oxygen is visualized as joined to oxygen
peroxided; peroxiding
: to treat with a peroxide
especially
: to bleach (hair) with hydrogen peroxide
: having or being bleached hair
a peroxide blonde
Examples of peroxide in a Sentence
Recent Examples on the Web
Mike Stunson, USA Today, 17 June 2026
If the stain is still visible, use the vinegar or baking soda and peroxide method to treat the stain.
—Mary Marlowe Leverette, Southern Living, 14 June 2026
Lauren Valenti, Vogue, 4 Feb. 2019
Christina Perrier, InStyle, 5 June 2026
There’s also a gleeful sequence where the six members of the virtuosic onstage band swan around in polyester housecoats and peroxide wigs, all representing H’s childhood piano teacher, Doris, a woman who toured with Horowitz and sounds like Foghorn Leghorn with a pack-a-day Virginia Slims habit.
—Sara Holdren, Vulture, 20 May 2026
See All Example Sentences for peroxide
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Noun
The hydrogen peroxide dumped into the reflecting pool was 12% concentrate, four times stronger than household peroxide.
—Mike Stunson, USA Today, 17 June 2026
If the stain is still visible, use the vinegar or baking soda and peroxide method to treat the stain.
—Mary Marlowe Leverette, Southern Living, 14 June 2026
Verb
Freshly peroxided, Mock headed to the skatepark later that day.
—Lauren Valenti, Vogue, 4 Feb. 2019
Adjective
As for beauty, Madonna styled her peroxide blonde hair down in soft waves with a middle part.
—Christina Perrier, InStyle, 5 June 2026
There’s also a gleeful sequence where the six members of the virtuosic onstage band swan around in polyester housecoats and peroxide wigs, all representing H’s childhood piano teacher, Doris, a woman who toured with Horowitz and sounds like Foghorn Leghorn with a pack-a-day Virginia Slims habit.
—Sara Holdren, Vulture, 20 May 2026
See All Example Sentences for peroxide
Cite this Entry
“Peroxide.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/peroxide. Accessed 19 Jun. 2026.
Copy CitationMedical Definition
peroxide
noun
per·ox·ide
pə-ˈräk-ˌsīd
: a compound (as hydrogen peroxide) in which oxygen is visualized as joined to oxygen
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