greengage /ˈɡɹiːnɡeɪd͡ʒ/ noun1 •A plum cultivar with greenish-yellow flesh and skin, Prunus domestica subsp. italica var. claudiana.The apricot rarely produces any fruit, except in a few places, and then very scantily. The greengage plum is nearly equally unproductive. — 1834 formsgreengages