shampoo
n. C / U A1 Beginner US //ʃæmˈpu// UK //ʃæmpˈuː// sham·poo
n. a special liquid soap you use to wash your hair. It helps remove dirt and oil from your scalp.
n. a liquid preparation containing detergent or soap for washing the hair and scalp.
I need to buy more shampoo for the shower.
She massaged the shampoo into her hair until it formed a thick white foam.
While many commercial shampoos rely on synthetic sulfates to create lather, organic alternatives often use plant-derived cleansers that are gentler on sensitive skin.
From Hindi चाँपो (cā̃po) / चांपो (cāmpo), imperative form of चाँपना (cā̃pnā) / चांपना (cāmpnā, “to press, knead”), mid 18th c.
Usage
Uncountable when referring to the substance in general; countable when referring to a specific brand or bottle.