ˈthrashə(r), -raash-, -raish-, -resh- noun
( -s )
Etymology: Middle English thressher, from thresshen to thresh + -er, -ere -er
1. : one that threshes : a threshing machine or a person tending or operating a flail or a threshing machine
2. also thresher shark : a large shark ( Alopias vulpinus ) nearly cosmopolitan in distribution that is distinguished by the greatly elongated curved upper lobe of its tail with which it is said to thresh the water to round up the fish on which it feeds and that is highly regarded as a sport fish and in some areas used as food — called also fox shark