Akademik

lieutenant commander
noun
a commissioned officer in the Navy ranking above a lieutenant and below a commander
• Topics: ↑military, ↑armed forces, ↑armed services, ↑military machine, ↑war machine
• Hypernyms: ↑commissioned naval officer

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noun, pl ⋯ -ers [count]
: an officer in the navy or coast guard who has a rank just below a commander

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lieuˌtenant comˈmander 7 [lieutenant commander lieutenant commanders] noun
an officer of middle rank in the navy

Useful english dictionary. 2012.