Official

noun
1.
a person appointed or elected to an office or charged with certain duties.
adjective
2.
of or relating to an office or position of duty, trust, or authority:
official powers.
3.
authorized or issued authoritatively:
an official report.
4.
holding office.
5.
appointed or authorized to act in a designated capacity:
an official representative.
6.
(of an activity or event) intended for the notice of the public and performed or held on behalf of officials or of an organization; formal:
the official opening of a store.
7.
Pharmacology. noting drugs or drug preparations that are recognized by and that conform to the standards of the United States Pharmacopeia or the National Formulary.
adjective
1.
of or relating to an office, its administration, or its duration
2.
sanctioned by, recognized by, or derived from authority: an official statement
3.
appointed by authority, esp for some special duty
4.
having a formal ceremonial character: an official dinner
noun
5.
a person who holds a position in an organization, government department, etc, esp a subordinate position
adjective
1.
of or relating to one of the two factions of the IRA and Sinn Féin, 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)
noun
2.
a member of the Official IRA and Sinn Féin

official of·fi·cial (ə-fĭsh’əl)
adj.
Authorized by or contained in the U.S. Pharmacopoeia or National Formulary. Used of drugs.