Definition from macmillandictionary.com
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Oh darling, did you see that note I left you?
‘I gave you the money last week, remember?’ ‘Oh yeah, sorry, I completely forgot.’
Oh, what a beautiful view!
Oh, how stupid! I’ve left the key in the car.
‘You haven’t invited her husband, have you?’ ‘Of course I have.’ ‘Oh. Well don’t expect me to come then.’
He was, oh, sixty at the time.
‘He just resigned.’ ‘Oh, did he?’
‘David should be home next week.’ ‘Oh yes?’
Then he says oh I thought you weren’t coming.