The greengages are a group of cultivars of the common European plum. The first true greengage came from a green-fruited wild plum (Persian: گوجه‌سبز, romanized: Gowjehsabz) which originated in Iran (Persia). Greengages are grown in temperate areas and are known for the rich, confectionery flavour. They are considered to be among the finest dessert plums.Anna Pavord calls them “most ambrosial of all tree fruit.” David Karp describes them as “the best fruit in the world”

The Oxford English Dictionary regards "gage" and "greengage" as synonyms. However, not all gages are green, and some horticulturists make a distinction between the two words, with greengages as a variety of the gages, scientifically named Prunus domestica (subsp. italica var. claudiana.) The gages otherwise include the large and usually purple to blackish but occasionally bright yellow round plums as well as the ancient and little-known Austrian varieties Punze (var. rotunda) and Weinkriech (var. vinaria).