noun a person who holds no official position
adjective not officially authorized or confirmed
Unofficial statements from government officials can provide insight into their true intentions.
Unofficial software updates may contain bugs and are not recommended for use in production environments.
Unofficial transcripts may be used for informational purposes but are not considered official records.
Unofficial reports suggest that the star player may be considering retirement.
An unofficial biography of the celebrity was released without the approval of their management.
The unofficial advice given by the self-proclaimed 'relationship expert' could be harmful to those seeking professional help.
The journalist published an unofficial report on the company's financial status, sparking controversy.
The lawyer warned their client about the risks of relying on unofficial legal advice from online forums.
The doctor cautioned against following unofficial medical treatments recommended by unlicensed practitioners.
The engineer discovered an unofficial modification to the design of the building that posed a safety hazard.