Noun

• S: (n) official, functionary (a worker who holds or is invested with an office)
• S: (n) official (someone who administers the rules of a game or sport) "the golfer asked for an official who could give him a ruling"

Adjective

• S: (adj) official (having official authority or sanction) "official permission"; "an official representative"
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• antonym
• W: (adj) unofficial [Opposed to: official] (not having official authority or sanction) "a sort of unofficial mayor"; "an unofficial estimate"; "he participated in an unofficial capacity"
• derivationally related form
• S: (adj) official (of or relating to an office) "official privileges"
• pertainym
• derivationally related form
• W: (n) office [Related to: official] (an administrative unit of government) "the Central Intelligence Agency"; "the Census Bureau"; "Office of Management and Budget"; "Tennessee Valley Authority"
• S: (adj) official (verified officially) "the election returns are now official"
• S: (adj) official, prescribed (conforming to set usage, procedure, or discipline) "in prescribed order"
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• derivationally related form
• antonym
• W: (adj) irregular [Indirect via regular] (contrary to rule or accepted order or general practice) "irregular hiring practices"
• S: (adj) official ((of a church) given official status as a national or state institution)
• domain category
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• antonym