- The great seal is defined as the official seal of a nation or state that is used to verify official documents.
An example of the great seal is the stamp on a U.S. passport that makes it authentic.
The Great Seal of the United States.
late 19th-century lithograph of the Great Seal of the United States
(plural great seals)
- Often capitalised when referring to individual examples.
(plural Great Seals)
- The official public seal of any of several nations.