1. Not having official authority or sanction
   "a sort of unofficial mayor"; "an unofficial estimate"; "he participated in an unofficial capacity" 
2. Not officially established
   "the early election returns are unofficial"

See also: drumhead, informal, loose, summary, unauthorised [Brit], unauthorized, unconfirmed, unofficially, unsanctioned, wildcat

Antonym: official

Encyclopedia: Unofficial

• Japanese black pine
• Japanese brome
• Japanese capital
• Japanese carpet grass
• Japanese cedar
• Japanese cherry
• Japanese chess
• Japanese chestnut
• japanese clover
• Japanese crab
• Japanese deer
• Japanese deity
• Japanese flowering cherry
• Japanese honeysuckle
• Japanese hop
• Japanese iris
• Japanese Islands
• Japanese ivy
• Japanese lacquer tree
• Japanese lawn grass
• Japanese leaf
• Japanese leek
• Japanese lilac
• Japanese lime
• Japanese linden