unofficial
adjective /ˌʌnəˈfɪʃl/
/ˌʌnəˈfɪʃl/
[usually before noun]- that does not have permission or approval from somebody in authority
- an unofficial agreement/strike
- Unofficial estimates put the figure at over two million.
Extra Examples- It's one of numerous unofficial Harry Potter websites.
- The result for the athlete was an unofficial world best of 2 minutes 27 seconds.
- Unofficial reports indicated that up to 10 million people had been made homeless.
- Unofficial sources report that four people were killed in the accident
- that is not part of somebody’s official business
- The former president paid an unofficial visit to China.
opposite official