Definition of whet

• 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.
• v. t. - To make sharp, keen, or eager; to excite; to stimulate; as, to whet the appetite or the courage.
• n. - The act of whetting.
• n. - That which whets or sharpens; esp., an appetizer.