a few collocations of "stun"

Would you tell me whether I am right about my interpretation of the expressions in bold in the following sentences?

Nash is going to stun us all with his genius.

stun = overcome as with astonishment or disbelief

It stunned me to see him drunk.

William was quite stunned at my discourse.

stun = stagger, stupefy

He stunned the existed animal with a club.

She was stunned into unconsciousness.

stun = make senseless or dizzy by or as if by a blow;

The ear is stunned by the roar of the Falls of Niagara.

stun = deafen

The news stunned us.

stun = shock; throw someone’s into fits

Thanks for your efforts.