INOFFI'CIAL, adjective [in and official.] Not official; not proceeding from the proper officer; not clothed with the usual forms of authority, or not done in an official character; as an inofficial communication; inofficial intelligence. Pinckney and Marshall would not make inofficial visits to discuss official business.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI