Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “oh”


exclamation    //
used to express a variety of emotions, such as surprise and pleasure, often as a reaction to something someone has said: Oh, I didn’t know they were married. Oh, really?
(Definition of oh exclamation from the Cambridge Academic Content Dictionary © Cambridge University Press)
Focus on the pronunciation of oh

Definitions of “oh” in other dictionaries

Word of the Day


willing to give money, help, kindness, etc., especially more than is usual or expected

Word of the Day


Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More