hydrogen peroxide

noun

: an unstable compound H₂O₂ used especially as an oxidizing and bleaching agent, an antiseptic, and a propellant

Examples of hydrogen peroxide in a Sentence

Recent Examples on the Web

Grab some cleaning rags and an old toothbrush or scrub brush, as well as rubbing alcohol, hydrogen peroxide, bleach or detergent for smaller surface mold growths. —Bridget Reed Morawski, Architectural Digest, 14 Jan. 2025

Think: rubbing alcohol, hand sanitizer, white vinegar, hydrogen peroxide, dish soap, baking soda, and nail polish remover. —Christina Pérez, Vogue, 10 Jan. 2025

If any of these beverages spill onto your carpet, apply hydrogen peroxide or club soda to the stained area and blot with a clean cloth until the stain is gone. —Jessica Bennett, Better Homes & Gardens, 10 Dec. 2024

Note that hydrogen peroxide can bleach color, so do the test first. —Daley Quinn, Southern Living, 7 Dec. 2024

Word History

First Known Use

1872, in the meaning defined above

Kids Definition

hydrogen peroxide

noun

: an unstable liquid compound containing hydrogen and oxygen and used especially for bleaching and as an antiseptic

Medical Definition

hydrogen peroxide

noun

: an unstable compound H₂O₂ used especially as an oxidizing and bleaching agent and as an antiseptic