The definition of a turtledove is a type of pigeon known for cooing and making a soft purring sound.(noun)
An example of a turtledove is the bird in the song "The Twelve Days of Christmas."
See turtledove in Webster's New World College Dictionary
Origin: ME < OE turtle, turtla < L turtur, of echoic orig.
See turtledove in American Heritage Dictionary 4