- lieutenant - a commissioned military officer
--1 is a kind of commissioned military officer
--1 has particulars: first lieutenant; second lieutenant; sublieutenant- lieutenant, police lieutenant - an officer in a police force
--2 is a kind of lawman, law officer, peace officer
- deputy, lieutenant - an assistant with power to act when his superior is absent
--3 is a kind of assistant, helper, help, supporter
--3 has particulars: second-in-command; vicar-general; vice-regent- lieutenant - an officer holding a commissioned rank in the United States Navy or the United States Coast Guard; below lieutenant commander and above lieutenant junior grade
--4 is a kind of commissioned naval officer
- lieutenant, police lieutenant - an officer in a police force