Main entry: unofficial
Definition: not having official authority or sanction
Usage: a sort of unofficial mayor; an unofficial estimate; he participated in an unofficial capacity
Antonyms: official
Definition: having official authority or sanction
Antonyms: compact
Definition: closely and firmly united or packed together
Antonyms: tight
Definition: closely constrained or constricted or constricting
Antonyms: authorised, authorized
Definition: endowed with authority
Antonyms: formal
Definition: being in accord with established forms and conventions and requirements (as e.g. of formal dress)
Antonyms: formal
Definition: (of spoken and written language) adhering to traditional standards of correctness and without casual, contracted, and colloquial forms
Main entry: unofficial
Definition: not officially established
Usage: the early election returns are unofficial
Antonyms: confirmed
Definition: having been established or made firm or received the rite of confirmation