con·​di·​tion·​er | \ kən-ˈdi-sh(ə-)nər How to pronounce conditioner (audio) \

Definition of conditioner

: something that conditions specifically : a preparation used to improve the condition of hair

Examples of conditioner in a Sentence

Recent Examples on the Web

Among the first to undergo evaluation is Propyl paraben, which is used as a preservative in various shampoos, conditioners, and lotions, and Methylene glycol (more commonly known as formaldehyde), which is used in a slew of hair treatments. Ivana Rihter, Vogue, "Are Your Beauty Products Toxic? A New Senate Bill Aims to Tackle Unregulated Ingredients," 9 Mar. 2019 The company, which also makes Carrier air conditioners and Otis elevators, has been conducting a strategic review with an eye toward separating its operations. Thomas Gryta, WSJ, "United Technologies Gets China’s Approval for Rockwell Collins Deal," 23 Nov. 2018 Summer is a time of year when utility bills often rise, as people crank up appliances and devices such as air conditioners and swimming pool pumps that use lots of energy. Shelby Grad,, "Essential California: Three Californias? It's a longshot, but ...," 13 June 2018 On May 28, the temperature in Minneapolis soared to a record 100 degrees, the city's earliest 100-degree reading on record, buckling roads, straining air conditioners and triggering air-quality alerts. Doyle Rice, USA TODAY, "May was warmest on record for USA, breaking mark set during Dust Bowl," 6 June 2018 Local health workers and international aid groups retrofitted warehouses with power supplies, alarms and switches, sub-80 degree freezers, air conditioners, and so on. Adam Rogers, WIRED, "The Wild Logistical Ride of the Ebola Vaccine's High-Tech Thermos," 29 May 2018 Upgrade your conditioning regimen by using a deep conditioner once a week or by getting a salon treatment every eight weeks. Redbook, "5 Ways to Upgrade Your Hair," 2 Feb. 2012 Valvoline showed us the performance data of one good seal conditioner that swelled most seal materials, but actually reduced the swelling of one type that tended to swell excessively from the ingredients found in some other engine oils. Paul Weissler, Popular Mechanics, "How to Pick the Right Motor Oil for Your Car," 14 Feb. 2019 Patterson, a former assistant to Hall of Fame conditioner Shug McGaughey, sends this son of Tale of the Cat back out after running into an odds-on class dropper for Steve Asmussen that dominated from start to finish in this colt's initial try. Scott Shapiro, The Courier-Journal, "'s free pick for Saturday's races at Churchill Downs," 22 June 2018

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

See More

First Known Use of conditioner

1888, in the meaning defined above

Keep scrolling for more

Learn More about conditioner

Statistics for conditioner

Last Updated

18 Apr 2019

Look-up Popularity

Time Traveler for conditioner

The first known use of conditioner was in 1888

See more words from the same year

Keep scrolling for more

More Definitions for conditioner



English Language Learners Definition of conditioner

: a thick liquid that you put on your hair after washing it to make it softer and less dry

More from Merriam-Webster on conditioner

Spanish Central: Translation of conditioner

Nglish: Translation of conditioner for Spanish Speakers

Comments on conditioner

What made you want to look up conditioner? Please tell us where you read or heard it (including the quote, if possible).


marked by a state of overwhelming emotion

Get Word of the Day daily email!

Test Your Vocabulary

Words from Greek and Latin Quiz

  • roman forum
  • Which of the following months comes from a Latin word for “ten”?
True or False

Test your knowledge - and maybe learn something along the way.

Bee Cubed

Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!