Pronunciation: (krOOn),[key] —v.i. 1. to sing or hum in a soft, soothing voice: to croon to a baby. 2. to sing in an evenly modulated, slightly exaggerated manner: Popular singers began crooning in the 1930s. 3. to utter a low murmuring sound.
4. Scot. and North Eng. a. to bellow; low.
b. to lament; mourn.
—v.t. 1. to sing (a song) in a crooning manner.
2. to lull by singing or humming to in a soft, soothing voice: to croon a child to sleep.