from The American Heritage® Dictionary of the English Language, 4th Edition
- intransitive v. To hum or sing softly.
- intransitive v. To sing popular songs in a soft, sentimental manner.
- intransitive v. Scots To roar or bellow.
- transitive v. To sing softly or in a humming way: crooning a lullaby.
- n. A soft singing or humming.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- v. To hum or sing softly or in a sentimental manner.
- n. A soft or sentimental hum or song.
from the GNU version of the Collaborative International Dictionary of English
- intransitive v. To make a continuous hollow moan, as cattle do when in pain.
- intransitive v. To hum or sing in a low tone; to murmur softly.
- intransitive v. To sing in a soft, evenly modulated manner adapted to amplifying systems, especially to sing in such a way with exaggerated sentimentality.
- transitive v. To sing in a low tone, as if to one's self; to hum.
- transitive v. To soothe by singing softly.
- n. A low, continued moan; a murmur.
- n. A low singing; a plain, artless melody.
from The Century Dictionary and Cyclopedia
- To utter a low continued murmuring sound resembling moaning or lamenting.
- To sing softly and monotonously to one's self; hum softly and plaintively.
- To utter a low muffled roar; bellow monotonously.
- To sing in a low humming tone; hum; affect by humming.
- n. A low, hollow moan or bellow.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- v. sing softly
Middle English crounen, from Middle Dutch krōnen, to lament; see gerə-2 in Indo-European roots.(American Heritage® Dictionary of the English Language, Fourth Edition)
Middle Dutch kronen ("to groan, lament"), from Proto-Germanic *kre-, from Proto-Indo-European *gerH- (“to cry hoarsely”). (Wiktionary)