1. To cause someone to become senseless or dazed, by or as if by a blow: When Sally hit her head against the door frame in the dark last night, she was stunned for a few minutes.
2. To surprise or to upset someone excessively: The extremely negative criticism stunned the politician.

When Melba gets into one of her temper tantrums, she stuns or shocks her husband very much.

1. Related to causing someone to be very surprised or shocked: Jacob made a stunning discovery regarding the profits he made with his investment at the bank.
2. Quite beautiful or pleasing: Tabitha wore a stunning gown to her friend's wedding.