- invalidity
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1. LAW an invalid contract, agreement, document etc is not legally or officially acceptable:
• Wellcome's patent to the drug was ruled invalid because the company didn't invent the compound.
• evidence obtained using invalid warrants
2. not based on true facts and therefore not right:• The promotions lacked balance and made invalid comparisons between rival products.
3. COMPUTING if something that you type into a computer is invalid, the computer does not recognize or accept it:• The date is in an invalid format.
— invalidity noun [uncountable] :• The bonds are perforated with small holes to show their invalidity.
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invalidity UK US /ˌɪnvəˈlɪdəti/ noun [U]► the fact of not being legally or officially acceptable: »The company was fully aware of the invalidity of its patent.
► GOVERNMENT the condition of being unable to work because of health problems, and receiving money from a government or organization because of this : »The ex-soldier receives an invalidity pension from the Army.
Financial and business terms. 2012.