Null and void

Pro Tip 1/3

Use 'null and void' to describe something with no legal power, like a contract that’s been cancelled.

After the breach, their agreement is null and void.

Pro Tip 2/3

It's used when something legal, like a rule or law, no longer applies or is no longer enforced.

The previous zoning regulations are null and void.

Pro Tip 3/3

'Null and void' is formal and most common in legal, official, or solemn contexts, not casual speech.

The treaty was rendered null and void.