1. shocked or surprised so much that you cannot think clearly or react normally
2. temporarily unconscious or unable to think clearly due to a blow or impact

Examples

• She was stunned by the unexpected news of her promotion.
• The audience sat stunned after the magician’s incredible performance.
• He looked stunned when he heard about the accident.
• The boxer was stunned by the powerful punch to his head.
• I was completely stunned by her generous offer to help.
• The bird hit the window and lay stunned on the ground.
• We were all stunned into silence by the tragic announcement.