"unofficial" in the adjective sense
1. unofficial
not having official authority or sanction
"a sort of unofficial mayor"
"an unofficial estimate"
"he participated in an unofficial capacity"
2. unofficial
not officially established
"the early election returns are unofficial"
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License