noun the act of whetting.
2. whet ·noun that which whets or sharpens; ·esp., an appetizer.
3. whet ·vt to rub or on with some substance, as a piece of stone, for the purpose of sharpening; to sharpen by attrition; as, to whet a knife.
4. whet ·vt to make sharp, keen, or eager; to excite; to stimulate; as, to whet the appetite or the courage.