kosher(n = noun.food) - food that fulfills the requirements of Jewish dietary law;
is a kind of aliment, alimentation, nourishment, nutriment, nutrition, sustenance, victuals

1.  kosher(s = adj.all) cosher - conforming to dietary laws; "kosher meat"; "a kosher kitchen"

2.  kosher(s = adj.all) - proper or legitimate;

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. [Webster 1913 Suppl.]

2.  Proper; seemly; appropriate; legitimate; as, it's not kosher to do it that way. [PJC]

3.  Genuine. [PJC]

1.  Kosher food; also, a kosher shop. [Webster 1913 Suppl.]

2.  the practise of adherence to the Jewish ritual law; used mostly in the phrase keep kosher, v. i.. [PJC]

   To prepare in conformity with the requirements of the Jewish law, as meat. [Webster 1913 Suppl.]

kosher, adj. & n.
--adj.
1 (of food or premises in which food is sold, cooked, or eaten) fulfilling the requirements of Jewish law.
2 colloq. correct; genuine; legitimate.
--n.
1 kosher food.
2 a kosher shop.

Etymology:
Heb. kaser proper

not kosher