I. noun 1. a tropical West African tree which is cultivated for its fruit and has been introduced into the Caribbean and elsewhere.● Blighia sapida, family Sapindaceae. 2. [ mass noun] — the fruit of the ackee, which is eaten as a vegetable but is poisonous until fully ripe. • a tree full of ackees.
• [ mass noun]
a dish of ackee.
– origin late 18th cent.: from Kru ākee.