(1):
(n.) 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.
(2):
(n.) Hence, something that gives or enhances a pleasant taste, or the taste itself; an appetizer; also, keen enjoyment; relish; gusto.
(3):
(n.) The woody, thick skin inclosing the kernel of a walnut.
(4):
(v. t.) To give a relish or flavor to; to heighten the taste or relish of; as, to zest wine.
(5):
(v. t.) To cut into thin slips, as the peel of an orange, lemon, etc.; to squeeze, as peel, over the surface of anything.