verb to render something invalid or null
adjective having been declared invalid or null
Experimental results may be invalidated if the study design is flawed or if there are errors in data analysis.
In a court case, evidence may be invalidated if it is found to be unreliable or improperly obtained.
A financial transaction may be invalidated if it is found to be fraudulent or in violation of regulations.
Security measures may be invalidated if a vulnerability is discovered that compromises their effectiveness.
The writer's argument was invalidated by the lack of evidence to support their claims.
The psychologist's findings were invalidated after it was discovered that their research methods were flawed.