Lō'cust-tree, n.

n. (Bot.) A large North American tree of the genus Robinia (R. pseudacacia), producing large, slender racemes of white, fragrant, papilionaceous flowers, and often cultivated as an ornamental tree.

☞ The name is also applied to other trees of different genera, especially to those of the genus Hymenaea, of which H. courbaril is a lofty, spreading tree of South America; also to the Ceratonia siliqua, a tree growing in South America. Gray. Baird.