Half a. : Consisting of a moiety, or half; as, a half bushel; a half hour; a half dollar; a half view.

Half a. : Consisting of some indefinite portion resembling a half; approximately a half, whether more or less; partial; imperfect; as, a half dream; half knowledge.

Half adv. : In an equal part or degree; in some pa/ appro/mating a half; partially; imperfectly; as, half-colored, half done, half-hearted, half persuaded, half conscious.

Half a. : Part; side; behalf.

Half a. : One of two equal parts into which anything may be divided, or considered as divided; -- sometimes followed by of; as, a half of an apple.

Half v. t. : To halve. [Obs.] See Halve.

Example:
Can I substitute Half and Half for milk in a cheese cake I am baking?

Taxonomy
Movies, Music, Games, PlayStation 2, Textbooks, Game Cube, Best Seller, Shipping, Bargain Bin, New Releases, Wii, Bolte, Taylor, Playstation 3, Hot Deals, In the Spotlight, David G. Myers, Stephen E. Lucas.

Defination from the web:
Selling previously owned books, CDs, movies, and video games at substantial discounts. Users can sell their used products here as well.