invalidate
verb /ɪnˈvælɪdeɪt/
/ɪnˈvælɪdeɪt/
Verb Forms
| present simple I / you / we / they invalidate | /ɪnˈvælɪdeɪt/ /ɪnˈvælɪdeɪt/ |
| he / she / it invalidates | /ɪnˈvælɪdeɪts/ /ɪnˈvælɪdeɪts/ |
| past simple invalidated | /ɪnˈvælɪdeɪtɪd/ /ɪnˈvælɪdeɪtɪd/ |
| past participle invalidated | /ɪnˈvælɪdeɪtɪd/ /ɪnˈvælɪdeɪtɪd/ |
| -ing form invalidating | /ɪnˈvælɪdeɪtɪŋ/ /ɪnˈvælɪdeɪtɪŋ/ |
- invalidate something to prove that an idea, a story, an argument, etc. is wrong
- This new piece of evidence invalidates his version of events.
- Flawed research methods may invalidate the study’s conclusions.
- invalidate something if you invalidate a document, a contract, an election, etc., you make it no longer legally or officially acceptable
- Misuse of the mattress will invalidate the guarantee
Word Originmid 17th cent.: from medieval Latin invalidat- ‘annulled’, from the verb invalidare (based on Latin validus ‘strong’).