zestyEnglishOxford Dictionary of Englishzesty /ˈzɛsti / ▸ adjective ( zestier, zestiest) 1 tangy and agreeably sharp in taste or smell: zesty guacamole hints of zesty citrus fruit add some balance. 2 very enthusiastic and energetic; lively: the high school chorus performed a very zesty rendition of the song at their spring concert.