Longman Dictionary of Contemporary English homepage

Date: 1800-1900
Language: Yiddish
Origin: Hebrew kasher 'fit, suitable'

kosher

 adjective
     
Related topics: Food, Judaism
ko‧sher
1
a) RRJ kosher food is prepared according to Jewish law
b) DF kosher restaurants or shops sell food prepared in this way
2 informal something that is kosher is honest, legal, or really what it is claimed to be:
Are you sure this offer is kosher?
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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