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

Some Californians could be forced to turn down their air conditioners, hold off on doing their laundry or make other sacrifices in the name of energy conservation. Dale Kasler, sacbee, "Summer just got a little hotter: The state might have you turn down your AC | The Sacramento Bee," 9 May 2018 During higher speed driving, turn the air conditioner and radio down to check for interior quietness. Houston Chronicle, "Understand the importance of a proper test drive," 9 Mar. 2018 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

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

16 May 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).


a strong desire or propensity

Get Word of the Day daily email!

Test Your Vocabulary

Challenging Vocabulary Quiz Returns!

  • stylized drawing of woman pole vaulting across gap to get trophy
  • Which is a synonym of fuliginous?
Name That Thing

Test your visual vocabulary with our 10-question challenge!


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!