cosh
1[ kosh ]
/ kɒʃ /
noun
a blackjack; bludgeon.
verb (used with object)
to hit on the head with a cosh.
Words nearby cosh
Origin of cosh
11865–70; perhaps < Romany kosh, koshter stick
Definition for cosh (2 of 2)
cosh2
[ kosh ]
/ kɒʃ /
noun Mathematics.
hyperbolic cosine.
Origin of cosh
2Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for cosh
British Dictionary definitions for cosh (1 of 2)
cosh1
/ (kɒʃ) British /
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
British Dictionary definitions for cosh (2 of 2)
cosh2
/ (kɒʃ, ˈkɒsˈeɪtʃ) /
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
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Science definitions for cosh
cosh
Abbreviation of hyperbolic cosine
The American Heritage® Science Dictionary
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