/ ˌɪntəˈdʒekʃn; NAmE -tərˈdʒ-/ noun
( grammar ) a short sound, word or phrase spoken suddenly to express an emotion. Oh! , Look out! and Ow! are interjections.
SYN exclamation
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WORD ORIGIN
late Middle English : via Old French from Latin interjectio(n-) , from the verb interjicere , from inter- between + jacere to throw.