official

adjective

1 an official inquiry into the state of the hospital | until probate is granted the will is not official:

authorized, accredited, approved, validated, authenticated, authentic, certified, endorsed, documented, sanctioned, licensed, formal, recognized, authoritative, accepted, verified, legitimate, legal, lawful, valid, bona fide, proper, true, ex cathedra, signed, sealed, and delivered, signed and sealed;

informal kosher.

▷antonyms unofficial, unauthorized.

2 they were arrayed in all their finery for some official function:

ceremonial, formal, solemn, ritualistic, ceremonious;

pompous, stiff, bureaucratic, proper;

informal stuffed-shirt.

▷antonyms informal.

noun

a union official:

officer, office-holder, office-bearer, administrator, executive, appointee, functionary;

bureaucrat, dignitary, mandarin;

representative, agent;

derogatory apparatchik;

British jack-in-office.

easily confused words	official or officious?
See officious.