first lieutenant
noun/ˌfɜːst lefˈtenənt/
/ˌfɜːrst luːˈtenənt/
- an officer in the navy with responsibility for managing a ship, etc. under the guidance of the captain Topics War and conflictc2
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- an officer in the US army and air force just below the rank of a captainTopics War and conflictc2
- (informal) a person who is the next most important to somebody
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first lieutenant