1. in an extremely impressive or attractive way
2. in a way that causes shock or surprise

Examples

• She looked stunningly beautiful in her wedding dress.
• The mountain views were stunningly clear that morning.
• The team performed stunningly well in the championship.
• The news was stunningly unexpected.
• The architecture of the cathedral is stunningly intricate.
• He delivered a stunningly effective speech.
• The results were stunningly different from what we predicted.