lieu·ten·ant 
/luˈtɛnənt, Brit lɛfˈtɛnənt/ noun
plural lieu·ten·ants /luˈtɛnənt, Brit lɛfˈtɛnənt/ noun [count] 1 : an officer in the army, navy, or air force with a fairly low rank
▪ He was promoted to the rank of lieutenant. ▪ Good morning, Lieutenant Smith. — abbr. Lt. — see also first lieutenant, second lieutenant 2 US : an officer in a fire or police department who has a rank below a captain 3 : an assistant to another, more powerful person : a person who represents and works for someone else
▪ She has her best lieutenants working on a proposal. ▪ one of the mobster's most loyal lieutenants
▪ He was promoted to the rank of lieutenant. ▪ Good morning, Lieutenant Smith. — abbr. Lt. — see also first lieutenant, second lieutenant
▪ She has her best lieutenants working on a proposal. ▪ one of the mobster's most loyal lieutenants
