[{"Bold_text": "verb (used without object)", "List Items": ["to sing or hum in a soft, soothing voice:to croon to a baby.", "to sing in an evenly modulated, slightly exaggerated manner:Popular singers began crooning in the 1930s.", "to utter a low murmuring sound.", "Scot. and North England.to bellow; low .to lament; mourn .", "to bellow; low .", "to lament; mourn ."]}, {"Bold_text": "verb (used with object)", "List Items": ["to sing (a song) in a crooning manner.", "to lull by singing or humming to in a soft, soothing voice:to croon a child to sleep."]}, {"Bold_text": "noun", "List Items": ["the act or sound of crooning."]}]