A loud calling or crying out; outcry; loud or emphatic utterance; vehement vociferation; clamor; that which is cried out, as an expression of feeling; sudden expression of sound or words indicative of emotion, as in surprise, pain, grief, joy, anger, etc.

A word expressing outcry; an interjection; a word expressing passion, as wonder, fear, or grief.

A mark or sign by which outcry or emphatic utterance is marked; thus [!]; -- called also exclamation point.

an abrupt excited utterance; "she gave an exclamation of delight"; "there was much exclaiming over it"

a loud complaint or protest or reproach

a word that raises the emotional tone of an utterance, like O or alas

This gives a sense of astonishment, anger or urgency. e.g. Do that