Croon \Croon\, v. t. [imp. & p. p. {Crooned} (kr[=oo]nd); p. pr. & vb. n. {Crooning}.] 1. To sing in a low tone, as if to one's self; to hum. [1913 Webster] Hearing such stanzas crooned in her praise. --C. Bront['e]. [1913 Webster] 2. To soothe by singing softly. [1913 Webster] The fragment of the childish hymn with which he sung and crooned himself asleep. --Dickens. [1913 Webster]