- To utter the murmuring sound of a dove or pigeon or a sound resembling it. (verb-intransitive)
- To talk fondly or amorously in murmurs: The visitors cooed over the newborn baby. (verb-intransitive)
- To express or utter with soft murmuring sounds. (verb-transitive)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.