noun the woody, thick skin inclosing the kernel of a walnut.
2. zest ·vt to give a relish or flavor to; to heighten the taste or relish of; as, to zest wine.
3. zest ·vt to cut into thin slips, as the peel of an orange, lemon, ·etc.; to squeeze, as peel, over the surface of anything.
4. zest ·noun a piece of orange or lemon peel, or the aromatic oil which may be squeezed from such peel, used to give flavor to liquor, ·etc.
5. zest ·noun hence, something that gives or enhances a pleasant taste, or the taste itself; an appetizer; also, keen enjoyment; relish; gusto.