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cosh

¹

[kosh]Chiefly British Slang.

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SEE MORE SYNONYMS FOR cosh ON THESAURUS.COM

noun

a blackjack; bludgeon.

verb (used with object)

to hit on the head with a cosh.

Origin of cosh

¹

1865–70; perhaps < Romany kosh, koshter stick

cosh

²

[kosh]

noun Mathematics.

hyperbolic cosine.

Origin of cosh

²

First recorded in 1870–75; cos(ine) + h(yperbolic)

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Related Words for cosh

business, staff, truncheon, nightstick, bash, clobber, pummel, whack, bludgeon, sap, cudgel, works, baton, mace, blackjack, hammer, quarterstaff, hickory, mallet, shillelagh

Examples from the Web for cosh

Historical Examples of cosh

In his left pocket there was a cosh and in his right a revolver.
Tartarin de Tarascon
Alphonse Daudet
Copeland, Cosh, and M'Nair, along with their respective wives.
The Story of John G. Paton
James Paton
Cosh, a neddy, a life-preserver; any short, loaded bludgeon.
The Slang Dictionary
John Camden Hotten
Coshery, kosh′ėr-i, n. the ancient right of an Irish chief to quarter himself and his retainers on his tenantry—also Cosh′ering.
Chambers's Twentieth Century Dictionary (part 1 of 4: A-D)
Various
The cosh was a foot length of iron rod, with a knob at one end, and a hook (or a ring) at the other.
A Child of the Jago
Arthur Morrison

British Dictionary definitions for cosh

cosh

¹

noun

a blunt weapon, often made of hard rubber; bludgeon

an attack with such a weapon

verb (tr)

to hit with such a weapon, esp on the head

Word Origin for cosh

C19: from Romany kosh, from koshter skewer, stick

cosh

²

noun

hyperbolic cosine; a hyperbolic function, cosh z = 1/2 (e z + e –z), related to cosine by the expression cosh i z = cos z, where i = √–1

Word Origin for cosh

C19: from cos (ine) + h (yperbolic)

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for cosh

n.

"stout stick," 1869, of unknown origin.

Online Etymology Dictionary, © 2010 Douglas Harper

cosh in Science

cosh

Abbreviation of hyperbolic cosine

The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.