interjection

An interjection () is a word or expression that occurs as an utterance on its own and expresses a spontaneous feeling, situation or reaction. It is a diverse category, with many different types, such as exclamations (ouch!, wow!), curses (damn!), greetings (hey, bye), response particles (okay, oh!, m-hm, huh?), hesitation markers (uh, er, um), and other words (stop, cool). Due to its diverse nature, the category of interjections partly overlaps with a few other categories like profanities, discourse markers, and fillers. The use and linguistic discussion of interjections can be traced historically through the Greek and Latin Modistae over many centuries.

== Historical classification == Greek and Latin intellectuals as well as the Modistae have contributed to the different perspectives of interjections in language throughout history. The Greeks held that interjections fell into the grammatical category of adverbs. They thought interjections modified the verb much in the same way as adverbs do, thus interjections were closely connected to verbs.