definition of
astounding

[1] #1 astounding s. [dumbfounding, dumfounding] bewildering or striking dumb with wonder. wn

[2] #2 astounding s. [astonishing, staggering, stupefying] so surprisingly impressive as to stun or overwhelm; "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. wn