(1):

(n.) Any one of numerous species of pigeons belonging to Turtur and allied genera, native of various parts of the Old World; especially, the common European species (Turtur vulgaris), which is noted for its plaintive note, affectionate disposition, and devotion to its mate.

(2):

(n.) Any one of several species of pigeons more or less resembling the true turtledoves, as the American mourning dove (see under Dove), and the Australian turtledove (Stictopelia cuneata).