What is the meaning of astonishing?

verb

• Affect with wonder.
  • usage: "Your ability to speak six languages amazes me"
  • synonyms: amaze, astonish, astound

adjective

• Surprising greatly.
  • usage: "she does an amazing amount of work"; "the dog was capable of astonishing tricks"
  • synonyms: amazing
• So surprisingly impressive as to stun or overwhelm.
  • usage: "such an enormous response was astonishing"; "an astounding achievement"; "the amount of money required was staggering"; "suffered a staggering defeat"; "the figure inside the boucle dress was stupefying"
  • synonyms: astounding, staggering, stupefying