"The contract was annulled"
"void a plea"
show to be invalid
make ineffective by counterbalancing the effect of;
"Her optimism neutralizes his gloom"
"This action will negate the effect of my efforts"
- The election results were nullified because of voter fraud.
- Counterintelligence seeks to nullify the enemy's espionage efforts.
- He has no right to nullify laws.
- An unhealthy diet will nullify the effects of training.
A long line of referenda had nullified..the island's constitution.出自：Sanity