shampooed; shampooing; shampoos
Definition of shampoo
(Entry 1 of 2)
2a
: to wash (something, such as hair) with soap and water or with a special preparation
b
: to wash the hair of
shampoo
noun
plural shampoos
Definition of shampoo (Entry 2 of 2)
1
: an act or instance of shampooing
2
: a preparation used in shampooing
Keep scrolling for more
Keep scrolling for more
Keep scrolling for more
Keep scrolling for more
Test Your Vocabulary
The Exceptions Quiz III
-
- Which of these words does not mean "nonsense"?

Can you spell these 10 commonly misspelled words?
TAKE THE QUIZ
A daily challenge for crossword fanatics.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridged
Words at Play
Ask the Editors
Word Games
Share shampoo
Time Traveler for shampoo
The first known use of shampoo was in 1762
See more words from the same year