thresher definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
- a person who threshes
- threshing machine
- any of a family (Alopiidae, order Lamniformes) of large sharks of temperate and tropical seas, having a very long upper tail lobe, which supposedly threshes the water and drives its prey together
thresher definition by American Heritage Dictionary
- One that threshes: a thresher of grain.
- A threshing machine.
- Any of various large sharks of the genus Alopias, especially A. vulpinus of the Atlantic and eastern Pacific oceans, having a tail with a long whiplike upper lobe with which it strikes the surface of the water.