: a halogen element that is isolated as a heavy greenish-yellow diatomic gas of pungent odor and is used especially as a bleach, oxidizing agent, and disinfectant in water purification see Chemical Elements Table
Examples of chlorine in a Sentence
Recent Examples on the Web
In video footage shared by the agency, the officers noted smelling chlorine.
—
Dan Raby, CBS News, 5 Jan. 2026
Sanitize with Bleach ‘Modern’ bleach (as in, the kind that’s chlorine-based) has been around for over a century, and for good reason.
—Mary Cornetta, Better Homes & Gardens, 4 Jan. 2026
Never mix bleach and vinegar, as this releases dangerous chlorine gas.
—Brandee Gruener, Southern Living, 27 Dec. 2025
The facility’s chlorine test strips available on-site did not accurately measure the sanitizer level.
—Sacbee.com, 3 Dec. 2025
See All Example Sentences for chlorine
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Dan Raby, CBS News, 5 Jan. 2026
Sanitize with Bleach ‘Modern’ bleach (as in, the kind that’s chlorine-based) has been around for over a century, and for good reason.
—Mary Cornetta, Better Homes & Gardens, 4 Jan. 2026
Never mix bleach and vinegar, as this releases dangerous chlorine gas.
—Brandee Gruener, Southern Living, 27 Dec. 2025
The facility’s chlorine test strips available on-site did not accurately measure the sanitizer level.
—Sacbee.com, 3 Dec. 2025
See All Example Sentences for chlorine
Cite this Entry
“Chlorine.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/chlorine. Accessed 6 Jan. 2026.
Copy CitationKids Definition
chlorine
noun
chlo·rine
ˈklō(ə)r-ˌēn 
ˈklȯ(ə)r-,
-ən
: a nonmetallic element that is found alone as a heavy greenish yellow irritating gas having two atoms per molecule and a strong odor and that is used especially as a bleach, oxidizing agent, and disinfectant in water purification see element
Medical Definition
chlorine
noun
chlo·rine
ˈklō(ə)r-ˌēn, ˈklȯ(ə)r-, -ən
: a halogen element that is isolated as a heavy greenish yellow gas of pungent odor and is used especially as a bleach, oxidizing agent, and disinfectant in water purification
—symbol Cl
see Chemical Elements Table
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