n.[C]

1. （美国）陆军（或空军，海军陆战队）中尉，少尉；（英国）陆军（或海军陆战队）中尉
2. 海军上尉
3. 代理官员；副职官员，助理官员
   He was the Prime Minister's most trusted lieutenant.

   他是首相最信任的助手。

4. （消防队，警察队的）中尉，少尉

n.

1. a deputy or substitute acting for a superior.
2. a rank of officer in the British army, above second lieutenant and below captain.
3. a rank of officer in the navy, above sub lieutenant and below lieutenant commander.
4. (in the US) a police officer next in rank below captain.