Available Definitions:
1) v. t. - 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.
2) v. t. - To make sharp, keen, or eager; to excite; to stimulate; as, to whet the appetite or the courage.
3) n. - The act of whetting.
4) n. - That which whets or sharpens; esp., an appetizer.