OH

(EMOTION) [exclamation] - used to express a variety of emotions, such as surprise, disappointment and pleasure, often as a reaction to something someone has said"He's been married three times." "Oh, really? I didn't know that!""I'm afraid I can't come to the party." " Oh, that's a shame.""Oh, you're so kind! Thank you very much.""I'm sorry I forgot to ring you." "Oh, don't worry, honestly it doesn't matter."Oh is also used to introduce an idea that you have just thought of, or something that you have just remembered.Oh, I've just thought of a problem.Oh, and don't forget to lock the back door.Oh is also used with other expressions of disappointment, sadness, anger, annoyance, etc..oh dearoh helloh damn