Pronunciation: (zest),[key] —n. 1. keen relish; hearty enjoyment; gusto.
2. an agreeable or piquant flavor imparted to something.
3. anything added to impart flavor, enhance one's appreciation, etc.
4. piquancy; interest; charm.
5. liveliness or energy; animating spirit.
6. the peel, esp. the thin outer peel, of a citrus fruit used for flavoring: lemon zest.