Wordnet 3.0
ADJECTIVE (2)
1.
not having official authority or sanction;
- Example: "a sort of unofficial mayor"- Example: "an unofficial estimate"- Example: "he participated in an unofficial capacity"2.
not officially established;
- Example: "the early election returns are unofficial"
The Collaborative International Dictionary of English v.0.48:
Unofficial \Unofficial\
See official.
WordNet (r) 3.0 (2006):
unofficial
adj 1: not having official authority or sanction; "a sort of
unofficial mayor"; "an unofficial estimate"; "he
participated in an unofficial capacity" [ant: official]
2: not officially established; "the early election returns are
unofficial"