#1 stun v. [stupefy] make senseless or dizzy by or as if by a blow; "stun fish". wn
#2 stun v. [sandbag] hit something or somebody as if with a sandbag. wn
#3 stun v. [bedaze, daze] overcome as with astonishment or disbelief; "The news stunned her". wn
vizzz