Kosher \Ko"sher\, n. Kosher food; also, a kosher shop.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Kosher \Ko"sher\, v. t. [imp. & p. p. Koshered; p. pr. & vb. n. Koshering.]

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

Source: Webster's Revised Unabridged Dictionary (1913)
 

Kosher \Ko"sher\, a. [heb. kosh["e]r fit, proper.]

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. Hence, designating a shop, store, house, etc., where such food is sold or used.

Source: Webster's Revised Unabridged Dictionary (1913)