# zest

/ˈzɛst/ (US) · /zˈɛst/ (UK) · CEFR C1 · Noun

Source: https://englishreference.com/word/zest
Updated: 2026-05-07

## Definition

the outer skin of a citrus fruit like a lemon or orange, used to add flavor to food. It also means a feeling of great excitement and energy for life.

For teachers: the outermost, colored layer of the pericarp of citrus fruits, containing aromatic oils. In a figurative sense, refers to a quality of piquancy, stimulation, or keen enjoyment.

## Examples

- Add a little lemon zest to the cake batter for extra flavor.
- She approached every new project with a natural zest that inspired the rest of her team to work harder.
- The chef emphasized that while the juice provides acidity, it is the finely grated zest that carries the essential oils necessary for a truly aromatic citrus tart.

## Usage notes

- Uncountable when referring to the quality of enthusiasm; can be countable when referring to specific pieces of fruit skin in culinary contexts.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.