1. to make someone unconscious or unable to think clearly by hitting them on the head
2. to shock or surprise someone so much that they cannot react immediately

Examples

• The blow to his head stunned him for several minutes.
• The electric shock stunned the fish temporarily.
• The news of her promotion stunned everyone in the office.
• I was stunned by the beauty of the sunset.
• The audience was stunned into silence by the performance.
• The unexpected announcement stunned the entire community.
• She stood stunned, unable to believe what she had just heard.