WordReference can't find this exact phrase, but click on each word to see its meaning:
WordReference provides online dictionaries, not translation software. Please look up the individual words (you can click on them below) or ask in the forums if you need more help.
a person appointed or elected to an office or charged with certain duties.
adj.
of or pertaining to an office or position of duty, trust, or authority:official powers.
authorized or issued authoritatively:an official report.
holding office.
appointed or authorized to act in a designated capacity:an official representative.
(of an activity or event) intended for the notice of the public and performed or held on behalf of officials or of an organization; formal:the official opening of a store.
Drugs[Pharm.]noting drugs or drug preparations that are recognized by and that conform to the standards of the United States Pharmacopeia or the National Formulary.
Late Latin officiālis of duty, equivalent. to Latin offici(um) office + -ālis -al1