chlo·​rine | \ ˈklȯr-ˌēn How to pronounce chlorine (audio) , -ən\

Definition of chlorine

: 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

While this is a far bigger topic that this article allows for, one of the things in water that can be particularly damaging to hair and skin is chlorine. Steven Macari, Harper's BAZAAR, "Could a Shower Filter Be the Missing Component to Your Wellness Routine?," 1 May 2019 In April, the United States, France and Britain launched military strikes in Syria to punish Assad for an apparent attack using chlorine against civilians in the Damascus suburb of Douma. Susannah George, The Seattle Times, "US warns Russia, Syria against chemical weapons use," 28 Aug. 2018 Defense Secretary Jim Mattis said Friday that the US government was confident that Syrian forces had used chlorine in the deadly attack on civilians last Saturday in Douma, but did not provide evidence. Helene Cooper And Ben Hubbard,, "Pentagon says Syria strikes hit heart of chemical weapons program," 15 Apr. 2018 Most contained chlorine, while a nerve agent was used in an assault in November, the report said. Nick Kostov, WSJ, "French Publish Report Asserting Assad Used Chemical Weapons in Attack," 14 Apr. 2018 Winter comes with snow, ice, and salt, spring brings rain and dirt, summer adds on chlorine and salt water, and fall brings more dirt and leaves. Taylor Mead, House Beautiful, "Here's Exactly How To Maintain Wood Floors," 23 Jan. 2019 Many municipalities in the United States add fluoride to tap water to prevent tooth decay, so watering your plants once a week with fluoride-free bottled water may reduce or even eliminate fluoride, chlorine, and salts. Willi Evans Galloway, Good Housekeeping, "How to Grow Extra-Lush Lucky Bamboo," 20 Aug. 2018 Repeat the process using another soft cloth dipped in water to gently sponge away the chlorine, but don't rub or oversaturate the paper. Lauren Smith, Good Housekeeping, "How to Get Rid of Mold and Mildew in the Mustiest Corners of Your House," 6 Feb. 2019 Hard to kill Standard chlorine takes a long time to kill the cryptosporidium bacteria. Agnel Philip, azcentral, "Pool season is crypto season: How to lower the odds of getting infected," 26 May 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'chlorine.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of chlorine

1810, in the meaning defined above

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Statistics for chlorine

Last Updated

8 May 2019

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Time Traveler for chlorine

The first known use of chlorine was in 1810

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More Definitions for chlorine



English Language Learners Definition of chlorine

: a chemical that in its natural form is a greenish-yellow gas and has a strong smell


chlo·​rine | \ ˈklȯr-ˌēn How to pronounce chlorine (audio) , -ən\

Kids Definition of chlorine

: a chemical element that is a greenish yellow irritating gas of strong odor used as a bleach and as a disinfectant to purify water


chlo·​rine | \ ˈklō(ə)r-ˌēn, ˈklȯ(ə)r-, -ən How to pronounce chlorine (audio) \

Medical Definition of chlorine

: 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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More from Merriam-Webster on chlorine

Rhyming Dictionary: Words that rhyme with chlorine

Spanish Central: Translation of chlorine

Nglish: Translation of chlorine for Spanish Speakers

Britannica English: Translation of chlorine for Arabic Speakers Encyclopedia article about chlorine

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something valued as if it were money

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