Source : Webster's Revised Unabridged Dictionary (1913)

Exclamatory \Ex*clam"a*to*ry\, a.
   Containing, expressing, or using exclamation; as, an
   exclamatory phrase or speaker. --South. --
   {Ex*clam"a*to*ti*ly}, adv.

Source : WordNet®

exclamatory
     adj : sudden and strong; "an emphatic no" [syn: {emphatic}]