Definition of oh
1
—used to express an emotion (such as surprise or desire) or in response to physical stimuli
- Oh, no! I forgot my key.
- Oh, don't stop!
2
—used in direct address
- oh, waiter! Will you come here, please?
3
—used to express acknowledgment or understanding of a statement
- Oh, yes. It's one of my favorite cities.
4
—used to introduce an example or approximation
- Their house is about, oh, I'd say four miles from here.
