ˈarēˌerˈbän noun
( -s )
Etymology: French, from Old French arriereban, alteration (influenced by ariere, arriere behind) of herban proclamation to serve in the army, of Germanic origin; akin to Old High German heri army and to Old High German ban proclamation — more at harry , ban
1. : a proclamation of a king (as of France) calling to arms his immediate feudatories and their vassals
2. : the body of vassals summoned to military service