Phil was dumbstruck when he realized he was holding the winning lottery ticket.
The definition of dumbstruck is someone who is speechless from shock.
An example of dumbstruck is a man being unable to speak after his girlfriend tells him she's pregnant.
So shocked or astonished as to be rendered speechless.
- I suspect your main complaint regarding Sephora may end up being a genuine spirit of indecisiveness as you stand dumbstruck over their wide selection.
- Jackson stood dumbstruck; amazed the newborn possessed such control.