A military grade that is junior to the grade the adjective modifies: lieutenant colonel, lieutenant general, lieutenant commander.

(military, US) In the US Army, Air Force and Marines, holding the rank above Second Lieutenant and below Captain. Both ranks may be referred to as "Lieutenant" or as the complete forms of the ranks.

plural of lieutenant

Alternative letter-case form of lieutenant (when used as a title before a name)

plural of Lieutenant

plural of lieutenancy

The role, position, or domain of a lieutenant.

A rank in the RAF, between that of flying officer and squadron leader, of a person in charge of a flight of aircraft, equivalent to a Royal Navy lieutenant or an Army captain

(military) The second lowest rank of a commissioned officer in the United States Army, Air Force, or Marine Corps, ranking above a second lieutenant and below a captain. The rank of first lieutenant is equivalent to the naval rank of lieutenant junior grade.

plural of second lieutenant