of or relating to an office, its administration, or its duration

sanctioned by, recognized by, or derived from authority

appointed by authority, esp for some special duty

having a formal ceremonial character

a person who holds a position in an organization, government department, etc, esp a subordinate position

of or relating to one of the two factions of the IRA and SinnFéin, created by a split in 1969. The Official movement subsequently renounced terrorism and entered constitutional politics in the Irish Republic as the Workers'Party (now the Democratic Left)

a member of the Official IRA and Sinn Féin