What is the meaning of Zest?

The outer skin of a citrus fruit, used as a flavouring or garnish.

General vibrance of flavour.

Enthusiasm; keen enjoyment; relish; gusto. A state of being zesty.

The woody, thick skin enclosing the kernel of a walnut.

State of being a flamboyant or effeminate homosexual.

To scrape the zest from a fruit.

To make more zesty.

zest (of a fruit)

zest; the outer skin of a citrus fruit

Source: wiktionary.org