Unofficial

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.
not official or formal: an unofficial engagement
2.
not confirmed officially: an unofficial report
3.
(of a strike) not approved by the strikers’ trade union
4.
(of a medicinal drug) not listed in a pharmacopoeia
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

unofficial un·of·fi·cial (ŭn’ə-fĭsh’əl)
adj.
Of or being a drug that is not listed in the United States Pharmacopeia or the National Formulary.

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