interjection
UK: ˌɪntəˈdʒekʃən | US: ˌɪntərˈdʒekʃən
n. a word or phrase used to express sudden emotion or surprise (e.g., "Oh!", "Wow!")
n. (grammar) a part of speech that typically interrupts discourse to convey feeling
Derived from Latin interiectiō ("a throwing between"), combining inter- (between) and iacere (to throw). The word reflects the idea of "throwing" an expression into speech abruptly. Over time, it narrowed to its grammatical sense of an exclamatory word interrupting normal sentence flow.
"Hey!" is an interjection to grab attention.
She muttered an interjection of surprise when she saw the results.
In grammar class, we learned that "ouch" is an interjection.
His speech was full of emotional interjections.
The audience responded with loud interjections during the debate.