Law. a court order to a person, especially one requiring an appearance and answer. Compare subpoena.
4.
a formal notice from a bishop requiring the amendment of an ecclesiastical offense.
Origin: 1350–1400; Middle English monicio(u)n < Latin monitiōn- (stem of monitiō) warning, equivalent to monit(us) (past participle of monēre to advise, warn) + -iōn--ion