invalidation.

1. The removal of a document's, rule's, or decision's legal or practical force.

2. The showing that a claim, argument, or result is not sound or reliable.

3. The dismissal or denial of another person's feelings or experience as unworthy of acknowledgment.

Use it for

Words that belong together

• invalidation of a contract
• invalidation of an election

On the page

The missing signature led to the invalidation of the agreement.

Usage notes

Primary category: analysis / argumentation / evidence. Forms: Usually uncountable; no ordinary plural in this sense. Legacy lexical fields mirror sense 1 only. Use numbered sense fields for all meanings. Established modern English lexical item. No separate regional spelling or grammatical inflection entry. Writing functions: evaluation, analysis. Commonness: moderately common.