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[koh-sher] /ˈkoʊ ʃər/
  1. fit or allowed to be eaten or used, according to the dietary or ceremonial laws:
    kosher meat; kosher dishes; a kosher tallith.
  2. adhering to the laws governing such fitness:
    a kosher restaurant.
  1. proper; legitimate.
  2. genuine; authentic.
Informal. kosher food:
Let's eat kosher tonight.
verb (used with object)
Judaism. to make kosher:
to kosher meat by salting.
keep kosher, to adhere to the dietary laws of Judaism.
Also, kasher.
Origin of kosher
1850-55; 1920-25 for def 2; < Yiddish < Hebrew kāshēr right, fit
Related forms
nonkosher, adjective, noun
unkosher, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for unkosher


(Judaism) conforming to religious law; fit for use: esp, (of food) prepared in accordance with the dietary laws See also kasher, kashruth
  1. genuine or authentic
  2. legitimate or proper
Word Origin
C19: from Yiddish, from Hebrew kāshēr right, proper
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
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Word Origin and History for unkosher



"ritually fit or pure" (especially of food), 1851, from Yiddish kosher, from Hebrew kasher "fit, proper, lawful," from base of kasher "was suitable, proper." Generalized sense of "correct, legitimate" is from 1896.

Online Etymology Dictionary, © 2010 Douglas Harper
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unkosher in Culture

kosher definition

Food that is permitted according to a set of dietary restrictions found in the Old Testament. For many Jews, foods that are not kosher cannot be eaten. The term can also be used colloquially to mean anything acceptable: “I don't think it's kosher to yell at your chess opponent when he is thinking about his next move.”

kosher definition

The descriptive term in Judaism for food and other objects that are clean according to its laws. These laws are contained in the Torah and forbid, for example, the eating of pork or shellfish, the mixing of dairy products and meat, and certain methods of slaughtering animals.

The New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Slang definitions & phrases for unkosher



Proper; as it should be; legitimate: Everything looks kosher

[1896+; fr Yiddish fr Hebrew kasher, ''fit, proper'']

The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D.
Copyright (C) 2007 by HarperCollins Publishers.
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