Definitions of stunning:

• adjective:   causing or capable of causing bewilderment or shock or insensibility

  Example: "Laid the poor fellow senseless with one stunning blow"

• adjective:   causing great astonishment and consternation

  Example: "The strike came as a stunning protest against management"

• adjective:   strikingly beautiful or attractive

  Example: "Quite stunning with large dark eyes and a beautiful high-bosomed figure"

• adjective:   commanding attention

  Example: "A stunning performance"