interjection. Expression of surprise.interjection. Expression of wonder, amazement, or awe.interjection. Expression of understanding, recognition, or realization.interjection. A word to precede an offhand or annoyed remark.interjection. A word to precede an added or comment or afterthought.interjection. An invocation or address (similar to the vocative in languages with noun declension).interjection. Exclamation for drama or emphasis (often poetic).interjection. Expression of pain. See ouch.interjection. Space filler or extra syllable, especially in (popular) music.interjection. Used with a term of endearment.interjection. Expression of mild scepticismn. the letter O, o (more commonly spelled o)n. the digit 0 (especially in representations of speech)n. An utterance of oh; a spoken expression of surprise, acknowledgement, etc.v. To utter the interjection oh; to express surprise, etc.