in·val·id
(ˌ)in-ˈva-ləd 
: not valid:
a
: being without foundation or force in fact, truth, or law
an invalid assumption
declared the will invalid
b
: logically inconsequent
in·va·lid
ˈin-və-ləd
British usually -ˌlēd
: one who is sickly or disabled
in·va·lid
ˈin-və-ləd
-ˌlid,
British usually -ˌlēd,
or ˌin-və-ˈlēd
invalided; invaliding; invalids
1
: to remove from active duty by reason of sickness or disability
2
: to make sickly or disabled
in·va·lid
ˈin-və-ləd
British usually -ˌlēd
1
: affected by disease or disability : sickly
2
: of, relating to, or suited to one that is sick
an invalid chair
Synonyms
Adjective (1)
Adjective (2)
Examples of invalid in a Sentence
Adjective (1)
the treaty is invalid once one side violates it
that's an invalid assumption on your part
an argument which has one untrue premise is invalid
an invalid claim that can be easily disproved by the facts
Noun
Her husband has become an invalid.
Adjective (2)
an old and now invalid woman who rarely gets out anymore
Recent Examples on the Web
Eva Roytburg, Fortune, 7 June 2024
The billionaire's OpenAI competitor counts Andreessen Horowitz and a Saudi prince as investors in its Series B…
But now, after the package has been rendered invalid by the courts, Musk has received no compensation from Tesla for his recent work.
—William Gavin, Quartz, 6 June 2024
Over the past four years, U.S. courts and state bar associations have taken action to protect the integrity of the U.S. judicial system by penalizing attorneys who filed meritless lawsuits claiming – without evidence – that the 2020 presidential election results were invalid.
—Elise J. Bean, The Conversation, 4 June 2024
In 2015, the Missouri Supreme Court ruled in separate rulings that two cities’ red light camera laws were invalid.
—Eleanor Nash, Kansas City Star, 29 May 2024
The campaign brought in new outside lawyers, but by then, judges in Denson’s New York case had found the NDA invalid and other courts seemed likely to follow.
—Marilyn W. Thompson, ProPublica, 23 May 2024
The creators are asking for the court to declare the new law invalid and to stop it from being enforced.
—Wendy Lee, Los Angeles Times, 15 May 2024
Both requests were denied because the claims that J&J was in financial distress were invalid, per The New York Times.
—Charna Flam, Peoplemag, 2 May 2024
At least 670 of them, Schwartz alleges, are invalid, which means Aldama only has 1,697 signatures, making the candidate ineligible for the ballot this summer.
—Shawn Raymundo, The Arizona Republic, 17 Apr. 2024
Charles McNulty, Los Angeles Times, 4 Dec. 2023
As these invalids made their way to Portsmouth, nearly half slipped away, including one who hobbled off on a wooden leg.
—David Grann, The New Yorker, 28 Feb. 2023
Five hundred invalids from the Royal Hospital in Chelsea, many in their 60s and 70s, were ordered to fill out the ranks.
—Mary Ann Gwinn, Los Angeles Times, 14 Apr. 2023
In 1944, Marta’s parents, Rudolf Beck, aged seventy, and Regina, a chronic invalid at sixty-nine, died at Auschwitz.
—Andrew O’Hagan, The New York Review of Books, 13 Apr. 2021
Adjective
The entrepreneur has staked his credibility and that of the entire board on the ratification of his record $56 billion 2018 pay package deemed invalid in January by a Delaware state judge over governance failings.
—Eva Roytburg, Fortune, 7 June 2024
The billionaire's OpenAI competitor counts Andreessen Horowitz and a Saudi prince as investors in its Series B…
But now, after the package has been rendered invalid by the courts, Musk has received no compensation from Tesla for his recent work.
—William Gavin, Quartz, 6 June 2024
Over the past four years, U.S. courts and state bar associations have taken action to protect the integrity of the U.S. judicial system by penalizing attorneys who filed meritless lawsuits claiming – without evidence – that the 2020 presidential election results were invalid.
—Elise J. Bean, The Conversation, 4 June 2024
In 2015, the Missouri Supreme Court ruled in separate rulings that two cities’ red light camera laws were invalid.
—Eleanor Nash, Kansas City Star, 29 May 2024
The campaign brought in new outside lawyers, but by then, judges in Denson’s New York case had found the NDA invalid and other courts seemed likely to follow.
—Marilyn W. Thompson, ProPublica, 23 May 2024
The creators are asking for the court to declare the new law invalid and to stop it from being enforced.
—Wendy Lee, Los Angeles Times, 15 May 2024
Both requests were denied because the claims that J&J was in financial distress were invalid, per The New York Times.
—Charna Flam, Peoplemag, 2 May 2024
At least 670 of them, Schwartz alleges, are invalid, which means Aldama only has 1,697 signatures, making the candidate ineligible for the ballot this summer.
—Shawn Raymundo, The Arizona Republic, 17 Apr. 2024
Noun
Concern grew that the fabulous invalid, as the theater has long been dubbed, might be down for the count.
—Charles McNulty, Los Angeles Times, 4 Dec. 2023
As these invalids made their way to Portsmouth, nearly half slipped away, including one who hobbled off on a wooden leg.
—David Grann, The New Yorker, 28 Feb. 2023
Five hundred invalids from the Royal Hospital in Chelsea, many in their 60s and 70s, were ordered to fill out the ranks.
—Mary Ann Gwinn, Los Angeles Times, 14 Apr. 2023
In 1944, Marta’s parents, Rudolf Beck, aged seventy, and Regina, a chronic invalid at sixty-nine, died at Auschwitz.
—Andrew O’Hagan, The New York Review of Books, 13 Apr. 2021
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'invalid.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
Dictionary Entries Near invalid
Cite this Entry
“Invalid.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/invalid. Accessed 12 Jun. 2024.
Copy CitationKids Definition
invalid
1 of 4 adjective
in·val·id
(ˈ)in-ˈval-əd
: having no force or effect : not valid
an invalid parking sticker
an invalid assumption
invalidity
noun
ˌin-və-ˈlid-ət-ē
invalid
2 of 4 adjective
in·va·lid
ˈin-və-ləd
1
: suffering from disease or disability : sickly
2
: of, relating to, or suited to an invalid
invalid
3 of 4 nounlike 2
: one who is sickly or disabled
invalid
4 of 4 verb
in·va·lid
ˈin-və-ləd
-ˌlid
: to make sickly or disabled
Etymology
Adjective
from earlier invalid "not having a sound basis in fact or reason, not valid," from Latin invalidus "weak"
Adjective
from French invalide "suffering from a disease, sickly," from Latin invalidus "weak"
Legal Definition
invalid
adjective
in·val·id
in-ˈva-ləd
: being without force or effect under the law
declared the will invalid
invalidly
adverb
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