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[klawr-uh-neyt, klohr-] /ˈklɔr əˌneɪt, ˈkloʊr-/
verb (used with object), chlorinated, chlorinating.
  1. to combine or treat with chlorine.
  2. to introduce chlorine atoms into an organic compound by an addition or substitution reaction.
to disinfect (water) by means of chlorine.
Metallurgy. to treat (a gold ore) with chlorine gas in order that the gold may be removed as a soluble chloride.
1855-60; chlorine + -ate1
Related forms
chlorination, noun
chlorinator, noun
hyperchlorination, noun
postchlorination, adjective
unchlorinated, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for chlorinate
  • Although some households in the community are starting to chlorinate the water, this is a relatively new concept.
  • Clean and chlorinate swimming pools, outdoor saunas and hot tubs.
  • Clean and chlorinate swimming pools or drain and cover if not in use.
  • Regularly chlorinate swimming pools and keep pumps and filters operating.
  • Clean and chlorinate swimming pools that are not being used.
  • Contested in the courts, a city's right to chlorinate its water supply was upheld as a safeguard to public health.
  • De-chlorinate swimming pool water before discharging.
  • Clean and chlorinate swimming pools even if not being used.
  • To disinfect the distribution system chlorinate the source and pump or feed the water into the system.
British Dictionary definitions for chlorinate


verb (transitive)
to combine or treat (a substance) with chlorine
to disinfect (water) with chlorine
Derived Forms
chlorination, noun
chlorinator, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for chlorinate

1836 (implied in chlorinated), from chlorine (n.) + -ate (2). Related: Chlorinating.

Online Etymology Dictionary, © 2010 Douglas Harper
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chlorinate in Medicine

chlorinate chlo·ri·nate (klôr'ə-nāt')
v. chlo·ri·nat·ed, chlo·ri·nat·ing, chlo·ri·nates
To treat or combine with chlorine or a chlorine compound.

chlo'ri·na'tion n.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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chlorinate in Science
To add chlorine or one of its compounds to a substance. Water and sewage are chlorinated to be disinfected, and paper pulp is chlorinated to be bleached.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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