Kosher /(?)/

1. Ceremonially clean, according to Jewish law; -- applied to food, esp. to meat of animals slaughtered according to the requirements of Jewish law. Opposed to tref. For food to be officially kosher, it must be certified fit to eat by a Rabbi, according to Jewish ritual law; as, kosher food.
2. Proper; seemly; appropriate; legitimate; as, it's not kosher to do it that way. [colloq.]
3. Genuine. [colloq.]

1. Kosher food; also, a kosher shop.
2. the practise of adherence to the Jewish ritual law; used mostly in the phrase keep kosher, v. i..

imp. & p. p. Koshered; p. pr. & vb. n. Koshering

1. To prepare in conformity with the requirements of the Jewish law, as meat.