The Oxford Thesaurus An A-Z Dictionary of Synonyms - officialadj.

1) authorized, legitimate, lawful, legal, authentic, bona fide, proper, true, accredited, valid, documented, licensed, sanctioned, endorsed, certified, verified, recognized, accepted: I won't believe I've won till I hold the official notification in my own hands. 2) ceremonial, formal, solemn, ritualistic, ceremonious, pompous, stiff, proper, seemly, decorous: She has to make an acceptance speech at the official dinner. --n. 3) See officer, 1, above.