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
Natalia Gonzalez Blanco Serrano,
The Spruce,
18 June 2026
The hydrogen peroxide dumped into the reflecting pool was 12% concentrate, four times stronger than household peroxide.
—
Mike Stunson,
USA Today,
17 June 2026
Lauren Valenti,
Vogue,
4 Feb. 2019
Mary Marlowe Leverette,
Southern Living,
14 June 2026
Regularly voted British favorite artist, Hockney — instantly recognisable for his peroxide blonde hair, round glasses and flat cap — would be celebrated for his talents across almost every medium, including paint, photographs, etchings, lithographs, stained glass windows and digital.
—
Alex Ritman,
Variety,
12 June 2026
See All Example Sentences for peroxide
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Noun
Hydrogen peroxide is great for lightening stains in general.
—
Natalia Gonzalez Blanco Serrano,
The Spruce,
18 June 2026
The hydrogen peroxide dumped into the reflecting pool was 12% concentrate, four times stronger than household peroxide.
—
Mike Stunson,
USA Today,
17 June 2026
Verb
Freshly peroxided, Mock headed to the skatepark later that day.
—
Lauren Valenti,
Vogue,
4 Feb. 2019
Adjective
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
Regularly voted British favorite artist, Hockney — instantly recognisable for his peroxide blonde hair, round glasses and flat cap — would be celebrated for his talents across almost every medium, including paint, photographs, etchings, lithographs, stained glass windows and digital.
—
Alex Ritman,
Variety,
12 June 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 27 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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