- 1that does not have permission or approval from someone in authority an unofficial agreement/strike Unofficial estimates put the figure at over two million.
- 2that is not part of someone's official business The former president paid an unofficial visit to China. opposite official
unofficiallyjump to other results
NAmE//ˌʌnəˈfɪʃəli//adverb Costs were unofficially estimated at about $6,000. He had already been doing the job unofficially, and now he would be paid for it.