un ‧ con ‧ firmed /ˌʌnkənˈfɜːmd◂ $ -ˈfɜːrmd◂/ BrE AmE adjective
[ Word Family: verb : ↑ confirm ; noun : ↑ confirmation ; adjective : ↑ confirmed ≠ ↑ unconfirmed ]
unconfirmed report/story/rumour etc a report etc that has not been proved or supported by official information:
We’ve received unconfirmed reports of an explosion in central London.