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(intransitive) To speak in an admiring fashion, to be enthusiastic about.
The murmuring sound made by a dove or pigeon.
Shortening of cool. Compare foo.
Of onomatopoetic/imitative origin.
American Heritage Dictionary of the English Language, 5th Edition
Dad thinks it's a real coo, but Mom doesn't much care for the idea.
He grabs 'em where he can find 'em, she answered as she began to coo and squirm.
Of cash may lead to miller coo at year anticipating further.
At this age babies should coo and babble.
But some say are large but Melissa gruber coo such as problems.
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