conditioner

noun

con·​di·​tion·​er kən-ˈdi-sh(ə-)nər 

: something that conditions

specifically : a preparation used to improve the condition of hair

Examples of conditioner in a Sentence

Recent Examples on the Web

In addition to the serum, shop the hair oil and shine-boosting shampoo and conditioner that Moore also used. —Kaelin Dodge, InStyle, 31 Jan. 2026

Her top rules are to swap conditioner for a deep mask every wash, keep hair moisturized at night when dryness can worsen breakage, and use oils or leave-ins to protect your hair’s ends. —Essence, 29 Jan. 2026

Pair it with the brand’s conditioner bar, which also contains biotin and caffeine, to further boost volume and leave strands thick and shiny. —Alanna Martine Kilkeary, Glamour, 27 Jan. 2026

By conservative estimates, one air conditioner sends five gallons of atmospheric water down the drain daily. —Shi En Kim, AZCentral.com, 26 Jan. 2026

Word History

First Known Use

1888, in the meaning defined above

Rhymes for conditioner

• commissioner
• parishioner
• petitioner
• positioner
• practitioner
• missioner

Kids Definition

conditioner

noun

con·​di·​tion·​er kən-ˈdish-(ə-)nər 

: something that conditions

especially : a preparation used to improve the condition of hair