[ko.sher] adj [Yiddish, fr. Heb kasher fit, proper] (1851) 1 a: sanctioned by Jewish law; esp: ritually fit for use "~ meat" b: selling or serving food ritually fit according to Jewish law "a ~ restaurant"
2: being proper, acceptable, or satisfactory "found things going on that were not ~ --Homer Bigart"
[2]kosher vt ko.shered ; ko.sher.ing (1871): to make kosher [3]kosher n (1886): the observance of kosher practices--used in the phrase keep kosher