noun
1.
an officer in the navy with responsibility for managing a ship, etc.
2.
an officer in the US army and air force just below the rank of a captain
3.
( informal ) a person who is the next most important to sb
noun
1.
an officer in the navy with responsibility for managing a ship, etc.
2.
an officer in the US army and air force just below the rank of a captain
3.
( informal ) a person who is the next most important to sb
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005