: a piece of the peel of a citrus fruit (as an orange or lemon) used to flavor foods
: an enjoyable or exciting quality <Her humor added zest to the presentation.>
: keen enjoyment <They ate with zest.>
Word History of ZEST
The English word zest came from a French word zeste that means “the peel of an orange or a lemon.” Because their flavor made food more tasty and enjoyable, lemon and orange peels were used to season food. In time the word zest came to mean any quality that made life more enjoyable.