upside downadverb, adjectiveuk us
- Turn the mould upside down and give it a gentle tap.
- She came off her bike, which landed upside down in a muddy ditch.
- Can you turn it round the other way, it's upside down.
- It was an abstract painting and I couldn't tell whether it was upside down or not.
- Place the tin upside down on a baking tray.