1. 
   Three-mile
   Three'-mile` adjective Of or pertaining to three miles; as, the three-mile limit, or the limit of the marine belt (the three-mile belt or zone ) of three miles included in territorial waters (which see) of a state.
   Found op http://www.encyclo.co.uk/webster/T/49
   
   
2. 
   Three-mile
   • (a.) Of or pertaining to three miles; as, the three-mile limit, or the limit of the marine belt (the three-mile belt / zone) of three miles included in territorial waters (which see) of a state.
   Found op http://thinkexist.com/dictionary/meaning/three-mile/
   
   

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