(of food or places where food is sold, etc.) prepared or kept in conditions that follow the rules of Jewish law

kosher food/meat 符合犹太教规的食物／肉

a kosher restaurant/butcher/shop 犹太教餐馆／肉店／商店

legal, able to be trusted and therefore good

Their business activities aren't quite kosher. 他们的经营活动不太合法。