a person or thing that conditions a substance, esp a cosmetic, applied to something to improve its condition: hair conditioner
WordReference Random House Learner's Dictionary of American English © 2025
con•di•tion•er /kənˈdɪʃənɚ/USA pronunciation n.
WordReference Random House Unabridged Dictionary of American English © 2025- a thick liquid applied to the hair to make it easier to comb, etc.: [uncountable]Apply conditioner after shampooing.[countable]conditioners for every type of hair.
con•di•tion•er
(kən dish′ə nər),USA pronunciation n.
- a person or thing that conditions.
- something added to a substance to increase its usability, as a water softener.
- Clothinga cream or liquid preparation applied to the hair or skin, esp. for its emollient qualities.
- a trainer of athletes.
- an air conditioner.
- Textilesa person who conditions fibers or fabrics.
- condition + -er1 1590–1600
Collins Concise English Dictionary © HarperCollins Publishers::
'conditioner' also found in these entries (note: many are not synonyms or translations):
air conditioner
- air conditioning
- cooler
- dickey
- efficient
- energy efficiency ratio
- haymaker
- lady
- order
- perlite
- rebate
- servicewoman
- soil conditioner