kosher

nouns

food that fulfills the requirements of Jewish dietary law
is a type of (narrower)
a source of materials to nourish the body

adjectives

conforming to dietary laws
"kosher meat"; "a kosher kitchen"
proper or legitimate
is similar to
marked by suitability or rightness or appropriateness
"proper medical treatment"; "proper manners"
domain usage
a colloquial expression; characteristic of spoken or written communication that seeks to imitate informal speech