| lieu | (noun) the post or function properly or customarily occupied or served by another | Synonyms: place, position, stead |
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| lieutenancy | (noun) the position of a lieutenant | - |
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| lieutenant | (noun) an officer in a police force | Synonyms: police lieutenant |
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| (noun) a commissioned military officer | - |
| (noun) an assistant with power to act when his superior is absent | Synonyms: deputy |
| (noun) an officer holding a commissioned rank in the United States Navy or the United States Coast Guard; below lieutenant commander and above lieutenant junior grade | - |