sham·poo (shăm-pū')
n., pl., -poos.

1. Any of various liquid or cream preparations of soap or detergent used to wash the hair and scalp.
2. Any of various cleaning agents for rugs, upholstery, or cars.
3. The act or process of washing or cleaning with shampoo.

tr. & intr.v., -pooed, -poo·ing, -poos.
To wash or undergo washing with shampoo.

[From Hindi cā·pō, imperative of cā·pnā, to press.]

shampooer sham·poo'er n.

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The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.

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