Dictionary

An utterance of oh; a spoken expression of surprise, acknowledgement, etc.

To utter the interjection oh; to express surprise, etc.

Expression of surprise.

Example: Oh! I didn't see you there.

Expression of wonder, amazement, or awe.

Example: Oh, wow! That's amazing.

Expression of understanding, affirmation, recognition, or realization.

Example: Oh, so that's how it works.

A word to precede an offhand or annoyed remark.

Example: Oh, leave me alone.

The letter O, o (more commonly spelled o)

The digit 0 (especially in representations of speech)

Example: My telephone number is four-double-three-two-oh-nine.