- (n.) An officer who supplies the place of a superior in his absence; a representative of or substitute for, another in the performance of any duty.
- (n.) A commissioned officer in the army, next below a captain.
- (n.) A commissioned officer in the United States navy, in rank next below a lieutenant commander.
- (n.) A commissioned officer in the British navy, in rank next below a commander.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). lieutenant. Retrieved September 22, 2026, from http://smartdefine.org/lieutenant/definitions/2027810 |
| Chicago | Webster's. 2011. "lieutenant" http://smartdefine.org/lieutenant/definitions/2027810 (accessed September 22, 2026). |
| Harvard | Webster's 2011, lieutenant, Smart Define, viewed 22 September, 2026, <http://smartdefine.org/lieutenant/definitions/2027810>. |
| MLA | Webster's. "lieutenant" 27 May 2011. Web. 22 September 2026. <http://smartdefine.org/lieutenant/definitions/2027810> |