sublieutenant
/ˌsʌbluːˈtɛnənt/
noun
- A naval officer ranking below a lieutenant, typically the second-lowest commissioned rank in many navies.
- The sublieutenant was responsible for navigation duties during the voyage.
- After training, she was promoted to sublieutenant in the navy.
- The sublieutenant stood at attention on the deck of the ship.
Synonyms