Definition of "kosher" in English

adjective

1. (Judaism) Fit for use or consumption, in accordance with Jewish law (especially relating to food).

   • Only in New York can you find a good, kosher hamburger!
   • David's mother kept a kosher kitchen, with separate sets of dishes for meat and for dairy.
   • In order for a suit to be kosher, it cannot contain both wool and linen together.

2. Observant of the rules of kashrut (of a person or establishment).

   • "Are you kosher?" "No, I love to eat scallops."
   • "Is this restaurant kosher?" "No, we serve pork."

3. (figuratively, by extension) In accordance with standards or usual practice.

   • Is what I have done kosher with Mr. Smith?

adverb

1. In a kosher manner; in accordance with kashrut.

verb

1. (transitive) To kasher; to prepare (for example, meat) in conformity with the requirements of the Jewish law.