invalid

1 of 4

adjective (1)

in·​val·​id (ˌ)in-ˈva-ləd How to pronounce invalid (audio)
: not valid:
a
: being without foundation or force in fact, truth, or law
an invalid assumption
declared the will invalid
b
: logically inconsequent
invalidly adverb

invalid

2 of 4

noun

in·​va·​lid ˈin-və-ləd How to pronounce invalid (audio)
 British usually  -ˌlēd
: one who is sickly or disabled

invalid

3 of 4

verb

in·​va·​lid ˈin-və-ləd How to pronounce invalid (audio)
-ˌlid,
 British usually  -ˌlēd,
 or  ˌin-və-ˈlēd
invalided; invaliding; invalids

transitive verb

1
: to remove from active duty by reason of sickness or disability
2
: to make sickly or disabled

invalid

4 of 4

adjective (2)

in·​va·​lid ˈin-və-ləd How to pronounce invalid (audio)
 British usually  -ˌlēd
1
: affected by disease or disability : sickly
2
: of, relating to, or suited to one that is sick
an invalid chair

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
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.

Word History

Etymology

Adjective (1)

Latin invalidus weak, from in- + validus strong — more at valid

Adjective (2)

Latin & French; French invalide, from Latin invalidus

First Known Use

Adjective (1)

1542, in the meaning defined above

Noun

1701, in the meaning defined above

Verb

1787, in the meaning defined at sense 1

Adjective (2)

1642, in the meaning defined at sense 1

Time Traveler
The first known use of invalid was in 1542

Dictionary Entries Near invalid

Cite this Entry

“Invalid.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/invalid. Accessed 22 Jun. 2024.

Kids Definition

invalid

1 of 4 adjective
in·​val·​id (ˈ)in-ˈval-əd How to pronounce invalid (audio)
: having no force or effect : not valid
an invalid parking sticker
an invalid assumption
invalidity
ˌin-və-ˈlid-ət-ē
noun
invalidly adverb

invalid

2 of 4 adjective
in·​va·​lid ˈin-və-ləd How to pronounce invalid (audio)
1
: suffering from disease or disability : sickly
2
: of, relating to, or suited to an invalid

invalid

3 of 4 noun
like 2
 How to pronounce invalid (audio)
: one who is sickly or disabled

invalid

4 of 4 verb
in·​va·​lid ˈin-və-ləd How to pronounce invalid (audio)
-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"

Medical Definition

invalid

1 of 3 adjective
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

invalid

2 of 3 noun
: one who is sickly or disabled

invalid

3 of 3 transitive verb
in·​va·​lid
ˈin-və-ləd, -ˌlid, British usually -ˌlēd or ˌin-və-ˈlēd
1
: to remove from active duty by reason of sickness or disability
was invalided out of the army
2
: to make sickly or disabled
a patient invalided by valvular disease

Legal Definition

invalid

adjective
in·​val·​id in-ˈva-ləd How to pronounce invalid (audio)
: being without force or effect under the law
declared the will invalid
invalidly adverb

More from Merriam-Webster on invalid

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