Definition of kosher adjective from the Oxford Advanced Learner's Dictionary



    BrE BrE//ˈkəʊʃə(r)//
    ; NAmE NAmE//ˈkoʊʃər//
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  1. 1(of food) prepared according to the rules of Jewish law a kosher meal a kosher butcher/restaurant (= one that prepares or serves this food). See related entries: Diet
  2. 2(informal) honest or legal Their business deals are not always completely kosher. It all seems kosher enough.
  3. Word Originmid 19th cent.: from Hebrew kāšēr ‘proper’.
See the Oxford Advanced American Dictionary entry: kosher