1.<i>or</i><h2>exclamation point</h2><div><i>n</i><div> (Grammar) the punctuation mark ! used after exclamations and vehement commands</div><div> (Printing, Lithography & Bookbinding) this mark used for any other purpose, as to draw attention to an obvious mistake, in road warning signs, (in chess commentaries) beside the notation of a move considered a good one, (in mathematics) as a symbol of the factorial function, or (in logic) occurring with an existential quantifier</div></div>
