Definitions of sealed:

• adjective:   closed so tightly as to be airtight or watertight
• adjective:   covered with a waterproof coating

  Example: "A sealed driveway"

• adjective:   having been paved
• adjective:   determined irrevocably

  Example: "His fate is sealed"

• adjective:   closed or secured with or as if with a seal

  Example: "My lips are sealed"

• adjective:   established irrevocably

  Example: "His fate is sealed"

• adjective:   undisclosed for the time being

  Example: "Sealed orders"

• adjective:   (of walls) covered with a coat of plaster