Definition of: grease

(grēs) noun
1. Animal fat, especially when soft.
2. A thick, oily or unctuous substance resembling animal fat, derived from the distillation of petroleum.
3. Wool, after shearing and before cleansing: also grease wool.
4. The condition of wool or furs before being cleansed: wool in the grease.
5. A scabrous inflammation of a horse's pastern and fetlock, characterized by an odorous, oily secretion, and, in the later stages, formation of fungoid masses: also called grease-heel.
6. Fat or fatness in an animal, as a deer: a hunting term.
7. Slang A bribe; money used for bribery.
—v.t. (grēs, grēz) greased, greas·ing
1. To lubricate by smearing with grease; put grease in or on.
2. Slang To influence by gifts or bribes: to grease the hand or palm. [<OF graisse, ult. <L crassus fat]