Definitions
1.nounAnything or anyone that threshes.
2.nounA now-obsolete hand tool for threshing, also called a flail.
3.nounA modern farm machine for threshing grain, now a part of combine harvesters rather than a separate implement.
4.nounAny of several large pelagic sharks of the genus Alopias, which have a very long tail; more commonly called thresher sharks.