Definition of invalidate in English:

invalidate

Line breaks: in|vali|date
Pronunciation: /ɪnˈvalɪdeɪt
 
/

verb

[with object]

Derivatives

invalidation

Pronunciation: /-ˈdeɪʃ(ə)n/
noun
More example sentences
  • I asked members of the faculty at the University of Chicago Law School to estimate the number of Supreme Court invalidations of state and federal law.
  • The newspaper has written to the Independent Committee Against Corruption asking for the immediate return of seized material and the invalidation of warrants used against it.
  • Under one of the bills, the Post-Privatisation Control Agency should be allowed to take action towards invalidation of privatisation contracts in circumstances, which would justify such action.

Origin

mid 17th century: from medieval Latin invalidat- 'annulled', from the verb invalidare (based on Latin validus 'strong').

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