Definition of stuns:
(v) :
(transitive) To incapacitate; especially by inducing disorientation or unconsciousness.
(v) :
(transitive) To shock or surprise.
(n) :
The condition of being stunned.
(n) :
That which stuns; a shock; a stupefying blow.
(v) :
(intransitive, video games) To enter a stunned state.
(v) :
(Singapore, military, slang) To confiscate (an unguarded rifle, magazine, piece of equipment, etc.) from an unsuspecting soldier as punishment for neglect.