lieutenant
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noun
a deputy or substitute acting for a superior:
上官代理, 副官
e.g. he accepted his top lieutenant’s resignation with deep regret.
see first lieutenant, second lieutenant.
｟米｠ (陸軍･空軍･海兵隊の)中尉(first lieutenant), 少尉(second lieutenant); ｟英｠ (陸軍の)中尉.
a naval officer of a high rank, in particular a commissioned officer in the US Navy or Coast Guard ranking above lieutenant junior grade and below lieutenant commander.
(海軍の)大尉
a police or fire department officer next in rank below captain.
｟米｠ (警察署の)警部補, (消防署の)副署長
DERIVATIVES
lieutenancy | lo͞oˈtenənsē | noun (plural lieutenancies)
ORIGIN
late Middle English: from Old French(see lieu, tenant).
USAGE
In the normal British pronunciation of lieutenant, the first syllable sounds like lef. In the standard US pronunciation, the first syllable, in contrast, sounds like loo. It is difficult to explain where the f in the British pronunciation comes from. Probably, at some point before the 19th century, the u at the end of Old French lieu was read and pronounced as a v, and the v later became an f.