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

(UK) A commissioned officer of the Royal Navy ranking above a midshipman and below a lieutenant.

The lowest rank of a commissioned army officer, below a lieutenant.

A commissioned officer in the British Army or Royal Marines or the United States Army, United States Marine Corps, or United States Air Force, ranked above a major general and below a general.

plural of lieutenancy

The role, position, or domain of a lieutenant.

plural of lieutenant commander

plural of sub-lieutenant

plural of lieutenant

An army officer in many countries, ranking below a colonel and above a major. Often the commander of a battalion or the executive officer of a regiment.