invalidity

1 [in-vuh-lid-i-tee]
noun
lack of validity.

Origin:
1540–50; < Medieval Latin invaliditās. See invalid2, -ity

Dictionary.com Unabridged

invalidity

2 [in-vuh-lid-i-tee]
noun

Origin:
1905–10; invalid1 + -ity

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To invalidity
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World English Dictionary
invalid1 (ˈɪnvəˌliːd, -lɪd)
 
n
1.  a.  a person suffering from disablement or chronic ill health
 b.  (as modifier): an invalid chair
 
adj
2.  suffering from or disabled by injury, sickness, etc
 
vb
3.  to cause to become an invalid; disable
4.  chiefly (Brit) (usually foll by out; often passive) to require (a member of the armed forces) to retire from active service through wounds or illness
 
[C17: from Latin invalidus infirm, from in-1 + validus strong]
 
usage  It is best to avoid using the term invalid when referring to people with chronic illnesses or disabilities
 
inva'lidity1
 
n

invalid2 (ɪnˈvælɪd)
 
adj
1.  not valid; having no cogency or legal force
2.  logic (of an argument) having a conclusion that does not follow from the premises: it may be false when the premises are all true; not valid
 
[C16: from Medieval Latin invalidus without legal force; see invalid1]
 
invalidity2
 
n
 
in'validness2
 
n
 
in'validly2
 
adv

Collins English Dictionary - Complete & Unabridged 10th Edition
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Example sentences
Not that it alters the invalidity of your conclusion.
As you can see, the invalidity of these arguments is obvious when you're not an advocate in the controversy.
Certificates of dissolution of marriage or declaration of invalidity of marriage.
If a participant was not scanned, all invalidity codes are missing.
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