DICT.TW Dictionary Taiwan

 Croon, v. t. [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.

 crooning
      n 1: singing in a soft low tone; "her crooning soon put the child
           to sleep"
      2: the act of singing popular songs in a sentimental manner