Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio.
- Now Rare the act of throwing back; check, stop, or reversal
- reversion to an earlier or more primitive type or condition
- an instance or example of this
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.
- A reversion to a former type or ancestral characteristic.
- See atavism.