1. Food regurgitated from the first stomach to the mouth of a ruminant and chewed again.
2. Something held in the mouth and chewed, such as a quid of tobacco.

[Middle English, from Old English cudu.]

The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.