Definition of the Great Seal from the Oxford Advanced Learner's Dictionary

     

    the Great Seal

     
    BrE
     
    ; NAmE
     
     
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  1. 1the state seal (= a tool for putting a design in wax on a document to show that it is official) of the United Kingdom. It is kept by the Lord Chancellor and used on documents of national importance.
  2. 2the national seal of the US. It is kept by the Secretary of State and used on documents of national importance.