1.Definition: causing great astonishment and consternation
"The strike came as a stunning protest against management", "A stunning defeat"
2.Definition: causing or capable of causing bewilderment or shock or insensibility
"Laid the poor fellow senseless with one stunning blow", "A stunning detonation with volumes of black smoke"
3.Definition: commanding attention
"A stunning performance"
4.Definition: strikingly beautiful or attractive
"Quite stunning with large dark eyes and a beautiful high-bosomed figure", "Stunning photographs of Canada's wilderness areas"