Pronunciation (UK) IPA (key): /əʊ/ (US) IPA (key): /oʊ/ Audio (UK)(file) Audio (US) (surprise)(file) Audio (US) (realization)(file) Interjection Interjectionoh You say oh to express surprise, pain, or other feelings. Oh! I couldn't believe you done that!Wikiwand - on Seamless Wikipedia browsing. On steroids.Remove ads