unofficial

Meanings

1. 1
   adj

   not having official authority or sanction

   a sort of unofficial mayor

2. 2
   adj

   not officially established

   the early election returns are unofficial

3. 3
   adj

   Not officially established.

   the unofficial results of the ballot

4. 4
   adj

   Not acting with official authority.

   an unofficial adviser

5. 5
   adj

   Not listed in a national pharmacopeia etc.

Etymology

From un- + official.