Definitions

valid

[val-id] / ˈvæl ɪd /

ADJECTIVE

right, genuine

Synonyms

STRONGEST

accurate authentic binding compelling conclusive credible good lawful legal legitimate logical original persuasive solid true well-founded

WEAK

attested authoritative bona fide cogent confirmed convincing determinative efficacious efficient good-faith in force irrefutable just kosher legit official potent powerful proven pure sound stringent strong substantial telling tested trustworthy ultimate unadulterated unanswerable uncorrupted weighty well-grounded

Antonyms

STRONGEST

counterfeit evil fake false illegal illegitimate illicit improbable invalid unlawful unlikely unreal unreliable untrustworthy wrong

WEAK

unacceptable unsound

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

In order to assess whether Trump’s lawsuit was valid, she ordered his personal attorneys and the DOJ to provide written explanations to the court detailing whether they were in conflict with each other.

From Slate • Jun. 4, 2026

Third, publish research that meets the criteria of relevant research—studies that answer questions that are timely, describe real problems, for which answers aren’t obvious, and for which findings are operationally valid.

From The Wall Street Journal • Jun. 3, 2026

It is illegal to own or possess one unless you have a valid Certificate of Exemption and follow strict rules.

From BBC • May 29, 2026

Of course, there are valid concerns with this take on the data.

From Barron's • May 29, 2026

Most likely, both the gossip theory and the there-is-a-lion-near-the-river theory are valid.

From "Sapiens: A Brief History of Humankind" by Yuval Noah Harari

Vocabulary lists containing valid

Jim Burke's Academic Vocabulary List

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TEKS ELAR Academic Vocabulary List (5th-7th grades)

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The Real Deal: Synonyms for "True"

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