Zest \Zest\, v. t. [imp. & p. p. Zested; p. pr. & vb. n. Zesting.]

1. To cut into thin slips, as the peel of an orange, lemon, etc.; to squeeze, as peel, over the surface of anything.

2. To give a relish or flavor to; to heighten the taste or relish of; as, to zest wine. --Gibber.

Source: Webster's Revised Unabridged Dictionary (1913)