Astounding means so surprising that it leaves you speechless. An astounding result, astounding news, quite astounding.
It is stronger than surprising and stronger than astonishing, and it belongs to figures and achievements rather than to small events. Said flatly, an astounding lack of something is a way of calling it inexcusable.
1adjectiveastoundingSo surprising that it leaves you speechless.
“The athlete ran the race in an astounding time, beating the world record by a full second.”
astounding is a quality.