Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. One that threshes: a thresher of grain.
  • n. A threshing machine.
  • n. 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.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Anything or anyone that threshes.
  • n. A now-obsolete hand tool for threshing, also called a flail.
  • n. A modern farm machine for threshing grain, now a part of combine harvesters rather than a separate implement.

from the GNU version of the Collaborative International Dictionary of English

  • n. Same as thrasher.

from The Century Dictionary and Cyclopedia

  • n. One who threshes: in this and the next sense commonly thresher.
  • n. A threshing-machine.
  • n. A sea-fox; a kind of shark, Alopias vulpes, so called from the enormous length of the upper division of the heterocercal tail, with which it threshes the water. See cut under Alopias. In this sense more commonly thrasher.
  • n. A member of an Irish Catholic organization instituted in 1806.
  • n. See thrasher.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. large pelagic shark of warm seas with a whiplike tail used to round up small fish on which to feed
  • n. a farm machine for separating seeds or grain from the husks and straw

Etymologies

thresh +‎ -er. The shark's tail is though to resemble the implement. (Wiktionary)

Examples

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