What is the meaning of stunned?

verb

• Make senseless or dizzy by or as if by a blow.
  • usage: "stun fish"
  • synonyms: stun, stupefy
• Hit something or somebody as if with a sandbag.
  • synonyms: sandbag, stun
• Overcome as with astonishment or disbelief.
  • usage: "The news stunned her"
  • synonyms: stun, bedaze, daze

adjective

• Filled with the emotional impact of overwhelming surprise or shock.
  • usage: "an amazed audience gave the magician a standing ovation"; "I stood enthralled, astonished by the vastness and majesty of the cathedral"; "astounded viewers wept at the pictures from the Oklahoma City bombing"; "stood in stunned silence"; "stunned scientists found not one but at least three viruses"
  • synonyms: amazed, astonied, astonished, astounded
• Knocked unconscious by a heavy blow.
  • synonyms: knocked out, kayoed, KO'd, out
• In a state of mental numbness especially as resulting from shock.
  • usage: "he had a dazed expression on his face"; "lay semiconscious, stunned (or stupefied) by the blow"; "was stupid from fatigue"
  • synonyms: dazed, stupefied, stupid