lieutenant
lieutenant
noun
/lefˈtenənt/
(abbreviation Lieut., Lt)
1 ​an officer of middle rank in the army, navy, or air force
Lieutenant Paul Fisher
see also first lieutenant, flight lieutenant, second lieutenant, sub lieutenant
Topics War and conflict C2
2 (in compounds) an officer just below the rank mentioned
a lieutenant colonel
Topics War and conflict C2
3 ​(in the US) a police officer of fairly high rank
Topics Law and justice C2
4 ​a person who helps somebody who is above them in rank or who performs their duties when that person is unable to
see also Lord Lieutenant
Word Origin
late Middle English: from Old French (see lieu, tenant).