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.
A reply to an insult seen as savage (frequently one that is tongue-in-cheek or joking).
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!
A brooch or clasp for fastening a piece of clothing together, especially when valuable or set with jewels.