Synonym: annul, avoid, cancel, nullify, quash, vitiate, void. Similar words: invalid, valid, validity, candidate, invade, in vain, invasion, convalesce. Meaning: [ɪn'vælɪdeɪt] 
v. 1. declare invalid 2. make invalid for use 3. show to be invalid 4. take away the legal force of or render ineffective.
v. 1. declare invalid 2. make invalid for use 3. show to be invalid 4. take away the legal force of or render ineffective. 
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31. Statistical treatments of data should not be used to invalidate a discrete chemical test result.
32. In 1994 Bradley sued Chiron, seeking to invalidate the patent, have himself included as a co-inventor, and receive damages and royalty income.
33. Failure to disclose all material information could invalidate the insurance.
34. Printing and other quality control errors will not invalidate an otherwise valid prize claim.
35. When her wave would crash, they fought because he would invalidate her need to be upset.
More similar words: invalid, valid, validity, candidate, invade, in vain, invasion, convalesce, trepidation, valiant, to date, update, mandate, date from, up to date, out of date, evaluate, accommodate, date back to, inveterate, investigate, materialistic, canvas, lid, solid, slide, hidalgo, didactic, stolid, galileo galilei.