Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio.
- the lower, posterior part of an animal's belly
- any vulnerable or unprotected area, region, point, etc.
Used by arrangement with John Wiley & Sons, Inc.
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
noun pl. un·der·bel·lies
- The soft belly or underside of an animal's body. Also called underbody.
- The vulnerable or weak part: “So much . . . can be learned from these and other neglected sources from the underbelly of traditional scholarship” (Stephen Jay Gould).