Citations:croon

Verb

 * 1) To hum or sing (a song or tune), or to speak (words), softly in a low pitch or in a sentimental manner; specifically, to sing (a popular song) in a low, mellow voice.
 * 1) To hum or sing (a song or tune), or to speak (words), softly in a low pitch or in a sentimental manner; specifically, to sing (a popular song) in a low, mellow voice.