unofficial

/ˌʌnəˈfɪʃəl/
adjective
  1. Not formally recognized or approved by an authority or organization.
    • She was the unofficial leader of the group, even though she had no title.
    • The club held an unofficial meeting to discuss the new rules.
    • According to unofficial reports, the company will announce layoffs next week.
  2. Not done or made in an official way; informal.
    • The artist released an unofficial version of the song online.
    • They made an unofficial visit to the school before applying.
    • It was an unofficial agreement, so neither side felt bound by it.
What does "unofficial" mean? | whatsthatwordmean | whatsthatwordmean