: 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 1915, chlorine gas became the first lethal chemical weapon used on the battlefield in World War I, and the German dye industry was the main supplier.
—
Literary Hub, 2 Apr. 2026
The most common byproducts from the use of chlorine as a disinfectant are trihalomethanes and haloacetic acids, which have been linked to cancer and other health problems.
—Sandee Lamotte, CNN Money, 2 Apr. 2026
The proprietary filtration system is specifically engineered to remove impurities, chlorine, harmful chemicals and heavy metals from your water.
—Tory Johnson, ABC News, 1 Apr. 2026
This releases chlorine atoms — like a microscopic, demented Pac-Man, a single one can devour more than 100,000 ozone molecules.
—Big Think, 31 Mar. 2026
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Literary Hub, 2 Apr. 2026
The most common byproducts from the use of chlorine as a disinfectant are trihalomethanes and haloacetic acids, which have been linked to cancer and other health problems.
—Sandee Lamotte, CNN Money, 2 Apr. 2026
The proprietary filtration system is specifically engineered to remove impurities, chlorine, harmful chemicals and heavy metals from your water.
—Tory Johnson, ABC News, 1 Apr. 2026
This releases chlorine atoms — like a microscopic, demented Pac-Man, a single one can devour more than 100,000 ozone molecules.
—Big Think, 31 Mar. 2026
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 Apr. 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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