someone who is appointed or elected to an office and who holds a position of trust; "he is an officer of the court"; "the club elected its officers for the coming year"任命される、任務に選出され、また信頼を受ける地位を占める誰か役員
例:He is an officer of the court. 彼は裁判所職員だ。
any person in the armed services who holds a position of authority or command; "an officer is responsible for the lives of his men"軍で権力があり命令を下せる立場にある者将校
例:an officer is responsible for the lives of his men 将校は部下の命を守る義務がある
a person authorized to serve in a position of authority on a vessel; "he is the officer in charge of the ship's engines"船上で権威ある地位につく権限を与えられた人高級船員
例:He is the officer in charge of the ship's engines. 彼は船の機関の担当責任者だ。
a member of a police force; "it was an accident, officer"警察のメンバー警察官