shampoo

American Heritage® Dictionary of the English Language, Fourth Edition

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

Century Dictionary and Cyclopedia

1. To rub and percuss the whole surface of (the body), and at the same time to extend the limbs and rack the joints, in connection with a hot bath, for the purpose of restoring tone and vigor to the system; a practice introduced from the East. Such kneading and rubbing of the whole body is now commonly called massage. Also used figuratively.
2. To lather, wash, and rub or brush (the head) thoroughly.
3. n. The act or operation of shampooing, in either sense.

Wiktionary

1. n. A traditional Indian and Persian body massage given after pouring warm water over the body and rubbing it with extracts from herbs.
2. n. A commercial liquid soap product for washing hair or other fibres/fibers, such as carpets.
3. n. An instance of washing the hair or other fibres with shampoo.
4. n. humorous, slang Champagne (wine).
5. v. intransitive To wash one's own hair with shampoo.
6. v. transitive To wash (i.e. the hair, carpet, etc.) with shampoo.

GNU Webster's 1913

1. v. To press or knead the whole surface of the body of (a person), and at the same time to stretch the limbs and joints, in connection with the hot bath.
2. v. To wash throughly and rub the head of (a person), with the fingers, using either soap, or a soapy preparation, for the more thorough cleansing.
3. n. The act of shampooing.

WordNet 3.0

1. n. cleansing agent consisting of soaps or detergents used for washing the hair
2. n. the act of washing your hair with shampoo
3. v. use shampoo on (hair)