The definition of exclamatory is a cry or remark that is sudden or strong and expresses an emotion.(adjective)
A shout of "ouch!" when you burn yourself is an example of an exclamatory remark.
See exclamatory in Webster's New World College Dictionary
Origin: < L exclamatus, pp. of exclamare (see exclaim) + -ory
See exclamatory in American Heritage Dictionary 4
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