Definitions

1. noun

a substance, typically liquid or cream, applied to the hair to improve its texture, manageability, and appearance, or to the scalp to soothe and calm it

“She uses a leave-in conditioner to prevent frizz and add shine to her hair.”

2. verb

to condition or prepare something, typically by applying a substance to it

“The hotel staff conditioned the leather sofas in the lobby before the party.”

3. noun

a person or thing that conditions something else

“The conditioner at the gym was very helpful in getting me to relax.”