Of or relating to or responsible for administration.

Roget 737a: regal, sovereign, governing; royal, royalist; monarchical, kingly; imperial, imperiatorial^†; princely; feudal; aristocratic, autocratic; oligarchic etc. n.; republican, dynastic.    ruling etc. v.; regnant, gubernatorial; imperious; authoritative, executive, administrative, clothed with authority, official, departmental, ex officio, imperative, peremptory, overruling, absolute; hegemonic, hegemonical^†; authorized etc. (due) 924.    [pertaining to property owned by government] government, public; national, federal; his majesty's [Brit.], her majesty's; state, county, city, etc. N.. ... show more

Roget 965: executive, administrative, municipal; inquisitorial, causidical^†; judicatory^†, judiciary, judicial; juridical.   

Dutch: bestuursrechtelijk
Polish: administracyjny