1. makes something legally or officially void or without effect
Usage: third person singular present tense of ‘invalidate’
2. proves something to be false or incorrect
Usage: third person singular present tense of ‘invalidate’

Examples

• The court invalidates the contract due to fraud.
• New evidence invalidates the original theory.
• A single mistake invalidates the entire test.
• The discovery invalidates years of research.
• The judge invalidates the election results.
• This finding invalidates our previous conclusions.
• The error invalidates all the data collected.