any of several American trees or shrubs of the genus Magnolia, esp M. acuminata, of E and central North America, having cup-shaped greenish flowers and cucumber-shaped fruits
2.
an E Asian tree, Averrhoa bilimbi, with edible fruits resembling small cucumbers: family Averrhoaceae
See also carambola
cucumber tree in American English
US
an American magnolia tree (Magnolia acuminata) with large, greenish flowers and fruit resembling a small cucumber