interjection

/IH0 N T ER0 JH EH1 K SH AH0 N/
noun
  1. 1

    (grammar) An exclamation or filled pause; a word or phrase with no particular grammatical relation to a sentence, often an expression of emotion.

  2. 2

    An interruption; something interjected

Synonyms

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Source: https://en.wiktionary.org/wiki/interjection