I. sham‧poo¹ /ʃæmˈpuː/ noun
[Date: 1700-1800; Language: Hindi; Origin: cãpo, from cãpna 'to press, shampoo']

1. [uncountable and countable] a liquid soap for washing your hair:
What kind of shampoo do you use?
a bottle of shampoo

2. [countable usually singular] when someone washes your hair using shampoo:
$21 for a shampoo, cut, and blow-dry
shampoo and set (=when someone washes your hair and then dries it so that it has a particular style, especially using curlers)

3. [uncountable and countable] a liquid used for cleaning carpets

[TahlilGaran] Dictionary of Contemporary English ▲

II. shampoo² verb [transitive]
to wash something with shampoo:
She showered and shampooed her short dark hair.

[TahlilGaran] Dictionary of Contemporary English ▲

shampoo
noun
I. liquid soap for washing hair
ADJ. anti-dandruff, baby, frequent-use, gentle, mild, moisturizing, revitalizing
VERB + SHAMPOO use, wash your hair with
PREP. ~ for a shampoo for greasy hair
PHRASES shampoo and conditioner

[TahlilGaran] Collocations Dictionary ▲

shampoo
II. act of washing hair
VERB + SHAMPOO give sb/sth | have
PHRASES a shampoo and set I'll have a shampoo and set, please.

[TahlilGaran] Collocations Dictionary ▲