kashruthEnglishOxford New American Dictionarykashruth /ˈkäSHrəTH, -ro͝ot, käSHˈro͞ot , ˈkɑʃrəθ / (also kashrut) ▸ noun the body of Jewish religious laws concerning the suitability of food, the fitness for use of ritual objects, etc. ▪ the observance of kashruth. – ORIGIN Hebrew, literally ‘legitimacy (in religion)’; see also kosher.