definition of zest
zest. n. 1. invigorating or keen excitement or enjoyment: a zest for living. 2. added interest, flavour, or charm; piquancy: her presence gave zest to the occasion. 3. (Cookery) something added to give flavour or relish.4. (Cookery) the peel or skin of an orange or lemon, used as flavouring in drinks, etc. vb. 5.erb. 1. zest-add herbs or spices to. spice up, spice. cookery, cooking, preparation-the act of preparing something (as food) by the application of heat; cooking can be a great art; people are needed who have experience in cookery; he left the preparation of meals to his wife.