Yossarian was dumbfounded by his state of rapturous contentment.
The girl was dumbfounded.
Milo was dumbfounded when he stepped down to the ground and found a contingent of armed M.P.s waiting to imprison the German pilots and confiscate their planes.
’Oh, no,’ groaned the chaplain, sinking down dumbfounded on his cot.
Mrs. Daneeka was dumbfounded.
The dog whimpered and squealed in brute, dumbfounded hysteria at the end of an old Manila rope and groveled and crawled on its belly without resisting, but the man beat it and beat it anyway with his heavy, flat stick.
There are no more uses of "dumbfounded" in the book.