invalid 1 of 3

adjective (1)

ˈin-və-ləd How to pronounce invalid (audio)
Definition of invalidnext
as in fragile
chronically or repeatedly suffering from poor health an old and now invalid woman who rarely gets out anymore

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invalid

2 of 3

adjective (2)

(ˌ)in-ˈva-ləd How to pronounce invalid (audio)
1
as in null
having no legal or binding force the treaty is invalid once one side violates it

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2
as in erroneous
not being in agreement with what is true that's an invalid assumption on your part

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3
as in unreasonable
not using or following good reasoning an argument which has one untrue premise is invalid

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4
as in unsupported
having no basis in reason or fact an invalid claim that can be easily disproved by the facts

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invalid

3 of 3

verb

as in to impair

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Dissimilar Words

Example Sentences

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Recent Examples of invalid
Adjective
It could even be suggested that intense charisma may impair followers’ ability to distinguish valid from invalid signals, since merely believing one is interacting with a charismatic person can reduce neural error-monitoring responses. — Tomas Chamorro-Premuzic, Forbes.com, 18 Aug. 2026 Specifically, Edgerton is asking the court to declare the petition void, rule that its data center prohibition is an invalid and permanently prevent the ordinance from being submitted to voters. — Kendrick Calfee, Kansas City Star, 15 Aug. 2026
Verb
If this is ascertained, the BBC quotes an LA attorney saying this would render Hackman’s will invalid, and mean his children could have a claim to the estate. — Caroline Frost, Deadline, 16 Mar. 2025 DeSantis's office has said all options are on the table for their fight, but a legal ruling invaliding the agreement that currently gives Disney near-total control of the district would be the easiest resolution for the governor's headache. — Jack Birle, Washington Examiner, 8 Apr. 2023 See All Example Sentences for invalid
Recent Examples of Synonyms for invalid
  1. fragile
  2. null
  3. erroneous
  4. unreasonable
  5. unsupported
  6. impair
  7. weak
  8. void
Adjective
  • When their ailing mother comes to live with them, old resentments resurface, forcing both women to confront grief, faith, ambition, and the fragile bonds that hold a family together.
    — Zac Ntim, Deadline, 28 Aug. 2026
  • The characters aren’t simply vulnerable—they’re contradictory and fragile.
    — Anna Marie de la Fuente, Variety, 28 Aug. 2026
Definition of fragile
Adjective
  • For one, null results—in this case, findings that are not unusual or revelatory—are still useful.
    — Jackie Flynn Mogensen, Scientific American, 4 June 2026
  • However, in the face of an increasing number of null results, most notably in studies published in late 2025, most physicists now agree that this sterile neutrino doesn’t exist.
    — Quanta Magazine, Quanta Magazine, 8 Apr. 2026
Definition of null
Adjective
  • The lawsuit alleges that South Dakota’s rollout of the proof-of-citizenship requirement has disqualified eligible voters over erroneous minutiae and failed to offer them a realistic shot at fixing problems with their registration application.
    — John Hult, States Newsroom, 28 Aug. 2026
  • Towers told ProPublica that the audit had reached erroneous conclusions, that the auditors did not give him the opportunity to fully defend his work and that the journal’s willingness to stand by the study is proof that his research is sound.
    — Amy Yurkanin, ProPublica, 24 Aug. 2026
Definition of erroneous
Adjective
  • Your expectations of your stepsons aren’t unreasonable at all.
    — R. Eric Thomas, Mercury News, 27 Aug. 2026
  • If the prosecution’s version of the evidence is reasonable and the defense’s is unreasonable, then that is not reasonable doubt.
    — Christine Pelisek, PEOPLE, 25 Aug. 2026
Definition of unreasonable
Adjective
  • The lawsuit says the decision was unlawful, unsupported by facts and inconsistent with the military’s past praise of Claude.
    — Reuters, NBC news, 28 Aug. 2026
  • The feedback is often vague, unsupported by concrete examples and disconnected from anything the employee could have reasonably corrected earlier.
    — Lauren Russell, Forbes.com, 18 Aug. 2026
Definition of unsupported
Verb
  • Riggs said the Teamsters’ safety argument is weakened by the inconsistent safety record of human truck drivers, who have fallen asleep at the wheel or driven while distracted or otherwise impaired.
    — Los Angeles Times, Los Angeles Times, 29 Aug. 2026
  • Summary Quality sleep is crucial for leaders' performance, yet unpredictable schedules often lead to sleep deprivation, thus impairing vital cognitive functions like memory.
    — Julian Hayes II, Forbes.com, 29 Aug. 2026
Definition of impair
Adjective
  • Many African economies are in a much weaker economic position compared to the strong 2015-2016 El Niño, the IIF report said, largely due to higher oil prices, which have driven up transport costs, and a strong US dollar.
    — Paige Bruton, semafor.com, 2 Sep. 2026
  • Too much nitrogen in the spring creates a weak root system that isn’t able to withstand the heat and drought in summer.
    — Megan Hughes, Better Homes & Gardens, 2 Sep. 2026
Definition of weak
Adjective
  • Buss said any such vote is void because the sale cannot be completed without her approval.
    — Steve Henson, Los Angeles Times, 25 Aug. 2026
  • After those dates, any approvals would become invalid or void, as if they had never been granted.
    — City News Service, Daily News, 20 Aug. 2026
Definition of void

Browse Nearby Words

in vain
invalid
invalidate
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Cite this Entry

“Invalid.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/invalid. Accessed 4 Sep. 2026.

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