(n) any of various North American trees or shrubs having showy white flowers and edible blue-black or purplish fruit, Syn.serviceberry, shadblow, shadbush, service tree
n. (Bot.) (a) The small applelike berry of American trees of genus Amelanchier; -- also called service berry. (b) The shrub or tree which bears this fruit; -- also called shad bush, and shad tree. [ 1913 Webster ]