• IPA: /ˈkɹuːn/

croon (croons, present participle crooning; past and past participle crooned)

1. (ambitransitive) To hum or sing softly or in a sentimental manner.
   • 1847 October 15, Currer Bell [pseudonym; Charlotte Brontë], Jane Eyre. An Autobiography. [...] In Three Volumes, volume 2, London: Smith, Elder, and Co., […], OCLC 3163777 ↗:

     hearing such stanzas crooned in her praise

2. (ambitransitive) To say softly or gently
   • 2020, Sydney Ember, Sanders drives himself to the polls., New York Times:

     "Nice seeing you both," a woman at the check-in said. "Hey, I love you," another crooned.

3. (transitive) To soothe by singing softly.
   • 1841 February–November, Charles Dickens, “Barnaby Rudge”, in Master Humphrey’s Clock, volume 73, London: Chapman & Hall, […], OCLC 633494058 ↗, (please specify the chapter number):

     The fragment of the childish hymn with which he sung and crooned himself asleep.

4. (Scotland) To make a continuous hollow moan, as cattle do when in pain.

• German: summen, säuseln
• Russian: напева́ть
• Spanish: canturrear

croon (plural croons)

1. A soft or sentimental hum or song.

• German: gefühlsbetontes Lied, sentimentaler Schlager, Schnulze, Schmacht­fet­zen