1. an abrupt remark, especially as an aside or interruption: "barracking and interjections from the protesters"Similarexclamationejaculationsudden utterancecryshoutroarcallrare:vociferation
▪ an exclamation, especially as a part of speech (e.g. ah!, dear me!).
Word Originlate Middle English: via Old French from Latin interjectio(n-), from the verb interjicere (see interject).