of‧fi‧cial 1 S3 W1 / əfɪʃ ə l / 名词 [可数名词] #

someone who is in a position of authority in an organization :

a government official

senior administration officials

official 2 S3 W2 adjective #

1 approved of or done by someone in authority, especially the government :
an official investigation into the causes of the explosion the official policy on education official statistics about illegal drug use You will have to get official permission first. Finally the letter of appointment came, making it all official. 2 relating to or done as part of an important job or position an official visit/engagement etc The President was leaving for a four-day official tour of Mexico. the Queen’s performance of official duties They dined in an official capacity with other European leaders. the Lord Mayor’s official residence 3 an official explanation, account etc is one that is given formally and publicly, but may not be true :
Many doubted the official version of events. The official line (= what is said publicly by people in authority ) was that the troops were there to protect the King. 4 chosen to represent someone or an organization, or do something for them :
the company’s official logo the official representative from the American administration 5 an official event is a formal public event :
The official opening of the institute was in May.

COLLOCATIONS

nouns an official visit/engagement etc (= one that relates to an important job or position ) The Prime Minister was on an official visit to China. somebody’s official duties (= the things someone does as part of their job or position ) the royal family’s official duties. an official residence (= a house someone is able to use as part of their important job ) the ambassador’s official residence in London somebody’s official capacity (= someone’s official position or duty ) He spent Wednesday in Washington acting in his official capacity as Senate majority leader.