lieutenant
noun
°The lowest commissioned officer rank or ranks in many military forces.
°In the US Army, Air Force and Marines, second lieutenant is the rank below first lieutenant, which is below captain. Both ranks may be referred to as Lieutenant or as the complete forms of the ranks.
adjective
°A military grade that is junior to the grade the adjective modifies: lieutenant colonel, lieutenant general, lieutenant commander.
synonyms: lt., lt, lieut., lieut