noun
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a person who threshes
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short for threshing machine
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Also called: thrasher. thresher shark. any of various large sharks of the genus Alopias, esp A. vulpinus, occurring in tropical and temperate seas: family Alopiidae. They have a very long whiplike tail with which they are thought to round up the small fish on which they feed
Etymology
Origin of thresher
First recorded in 1350–1400, thresher is from the Middle English word thressher. See thresh, -er 1
Explanation
A machine or tool used for separating seeds from a grain can be called a thresher. The mechanical thresher was invented in the 18th century. Threshers have simplified the work of agriculture, automating a job that humans once spent tedious hours doing. A combine is an even more efficient machine, combining a thresher and a harvester—it picks the grain and separates its seeds. A scythe is a curved knife used for hand threshing, and the thresher shark gets its name from a resemblance to this tool.
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
We’re not talking about a loom, a thresher, or a bolt-turning robot.
From Barron's • Feb. 25, 2026
Results of the study, published in the journal Royal Society Open Science, suggest thresher shark vertebral anatomy and mineralized microstructure meet the demands required for fast swimming and tail-whipping behavior seen in these species.
From Science Daily • Jan. 17, 2024
“This isn’t ‘Jaws,’ we’re not talking about a great white, man-eating machine — but if a thresher shark comes through and takes a nibble on your foot, that could be a problem,” said Mr. Epstein.
From New York Times • Jul. 2, 2022
Phoenix, meanwhile, has resembled basketball’s version of a thresher, ripping through the NBA and extracting what it wants.
From Los Angeles Times • Feb. 16, 2022
Leafie patiently fed small loads into the thresher.
From "Hattie Big Sky" by Kirby Larson
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
