1. (

• lieutenant ,

) a commissioned military officer ;

2. (

• lieutenant ,
• police_lieutenant

) an officer in a police force ;

3. (

• deputy ,
• lieutenant ,

) an assistant with power to act when his superior is absent ;

4. (

• lieutenant ,

) 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 ;