An expression of one's own physical pain.
''Ouch! You stepped on my toe! That hurt!''
An expression in sympathy at another's pain.
''Ouch! Her sunburn looks awful.''
''Ouch. How could you say that?''
An expression of disappointment.
''Ouch, I really wanted to do that.''
Expressing surprise at the high price of something.
''Ouch, one hundred thousand dollars for a car! I could never afford that!''
(alternative form of)