Croon — Defs

01 v. i. To make a continuous hollow moan, as cattle do when in pain.

1.
To make a continuous hollow moan, as cattle do when in pain.[Scot.]
2.
To hum or sing in a low tone; to murmur softly.
“Here an old grandmother was crooning over a sick child, and rocking it to and fro.” — Dickens.
3.
To sing in a soft, evenly modulated manner adapted to amplifying systems, especially to sing in such a way with exaggerated sentimentality.

02 v. t. To sing in a low tone, as if to one's self; to hum.

imp. & p. p. Crooned; p. pr. & vb. n. Crooning

1.
To sing in a low tone, as if to one's self; to hum.
“Hearing such stanzas crooned in her praise.” — C. Bronté.
2.
To soothe by singing softly.
“The fragment of the childish hymn with which he sung and crooned himself asleep.” — Dickens.

03 n. A low, continued moan; a murmur.