noun
1. great pleasure; keen enjoyment; relish.
The elderly woman’s zest for living made her seem much younger.
He set to work on the project with great zest.
2. sharpness or intensity of flavor.
This salad dressing has a lot of zest!
3. excitement; interest.
This room used to be so dull; the new bright colors give it some zest.
She bought a sexy red dress to add a little zest to her wardrobe.
You should go out more and put some zest back into your life.
4. the topmost layer of the peel of a lemon, lime, orange or other citrus fruit, often grated and used to add flavor to foods.
The pie recipe calls for the zest of one lemon.