conditioner
n. uncountable B1 Intermediate US //kənˈdɪʃənɝ// UK //kəndˈɪʃənɐ// con·di·tion·er
n. a liquid or cream you put in your hair after washing it to make it soft and easy to comb.
n. a cosmetic preparation applied to hair after shampooing to improve texture, manageability, and shine.
She used conditioner to make her hair soft.
After rinsing out the shampoo, he applied a generous amount of conditioner to his damp hair.
From condition + -er.