nullification
nounUK /ˌnʌlɪfɪˈkeɪʃən/
US /ˌnʌləfəˈkeɪʃən/
Nullification is when something is made to have no power or effect, like it never happened.
The judge's nullification of the unfair rule meant everyone could play again.
OTHER MEANINGS
2. In law, a jury's decision to ignore the evidence and acquit a defendant because they think the law is unfair.
Jury nullification let the defendant go free despite the strict law.
3. In US history, a state's claim that it could cancel a federal law it considered unconstitutional.
The doctrine of nullification was debated during the tariff crisis of the 1830s.
4. The act of making a legal agreement or contract no longer valid.
The nullification of the contract meant neither side had to follow it.