English Reference

Word

validity

Phoneticsva·lid·i·ty, stress on the second syllable

US/vəˈɫɪdəti/

UK/vælˈɪdɪti/

Definitions

01truth or logic

B2 · Upper Intermediate Uncountable noun Academic

n. the quality of being based on truth or sound reasoning.

n. the state of being logically or factually sound; the quality of being well-grounded in evidence.

“The lawyer questioned the validity of the witness's claims during the trial.”

“The researchers spent months gathering data to ensure the validity of their conclusions before submitting the paper for peer review.”

Synonyms

soundnesstruthlogic

Antonyms

falsityinvalidity

02legal force

B2 · Upper Intermediate Uncountable noun Law Formal

n. the state of being legally acceptable or official.

n. the state of being legally binding or officially acceptable under a set of rules.

“The contract lost its validity after the deadline passed.”

“The court ruled that the document lacked legal validity because it had not been signed in the presence of a notary.”

Antonyms

nullity

03scientific accuracy

C1 · Advanced Uncountable noun Science Technical · Academic

n. how well a test or experiment actually measures what it says it is measuring.

n. the extent to which a concept, conclusion, or measurement is well-founded and corresponds accurately to the real world.

“The scientists checked the validity of the test to make sure the results were correct.”

“Critics argued that the study lacked external validity, as the results from the small laboratory group could not be applied to the general population.”

Antonyms

Collocations

Common phrases and expressions where native English speakers use the word “validity” in context.

Verb

01. ensure validity

“Strict protocols were implemented during the experiment to ensure validity and minimize bias.”

verb + noun

02. establish validity

“Further studies are required to establish the validity of these initial findings.”

verb + noun

03. increase validity

“Using a double-blind procedure can significantly increase the validity of clinical trial results.”

verb + noun

Adjective

04. convergent validity

“The researcher used different methods to demonstrate the convergent validity of the new psychological test.”

adj + noun

05. external validity

“The study's small sample size limits its external validity, making it hard to generalize the results.”

adj + noun

06. internal validity

“The researchers addressed potential confounding variables to protect the internal validity of the study.”

adj + noun

07. validity assess

08. validity enhance

Real-World Examples

“The College Board devotes plenty of resources to what’s called predictive validity, examining whether the SAT truly measures what it’s supposed to: college readiness.”
Smithsonian Magazine 23 Jun 2026
“He is talking about limiting the validity of possession permits, and a possible amnesty to encourage those with unlicensed guns to hand them in.”
BBC News 16 Aug 2026

Etymology

From valid + -ity, borrowed from Middle French validité, from Late Latin validitas.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

Word family

NOUN

validity(C1)

ADJECTIVE

This entry

Exam level
CambridgeCambridgeCambridge English QualificationsThe exam suite from Cambridge University Press & Assessment, from A1 Movers up to C2 Proficiency. The benchmark names double as CEFR labels.C1 AdvancedIELTSIELTSInternational English Language Testing SystemThe 0–9 band test co-owned by the British Council, IDP, and Cambridge. Used for university entry, work, and migration.7.0–8.0TOEFL iBTTOEFL iBTTest of English as a Foreign Language, Internet-Based TestETS's academic English test, the standard route for US university admissions. Scored 0–120, with a 1–6 scale since 2026.1–6 scale: 5.0–5.595–113TOEICTOEICTest of English for International CommunicationETS's workplace English test, big in Japan and Korea. Listening & Reading scores 10–990 and tops out at C1.945–990
Frequency
Frequent
Level
C1 · AdvancedOxford
Updated

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English Reference