Source : Webster's Revised Unabridged Dictionary (1913)

Cultus \Cul"tus\ (k?l"t?s), n. sing. & pl.; E. pl. {Cultuses}
   (-?z). [L., cultivation, culture. See {Cult}.]
   Established or accepted religious rites or usages of worship;
   state of religious development. Cf. {Cult}, 2.