LEARNit Dictionary
first lieutenant
noun
/ˌfɜːst lefˈtenənt/
UK
/ˌfɜːrst luːˈtenənt/
US
1
an officer in the navy with responsibility for managing a ship, etc. under the guidance of the captain
ستوان یکم, ستوان اول
2
an officer in the US army and air force just below the rank of a captain
ستوان یکم
3
a person who is the next most important to somebody
معاون, نایب, نفر دوم