criterion

American  

[krahy-teer-ee-uhn] / kraɪˈtɪər i ən /

Rarely criterium

noun

plural

criteria, criterions

1. a standard of judgment or criticism; a rule or principle for evaluating or testing something.

   Synonyms:

   yardstick, touchstone, measure

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criterion British  

/ kraɪˈtɪərɪən /

noun

1. a standard by which something can be judged or decided

2. philosophy a defining characteristic of something

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Usage

Like some other nouns borrowed from the Greek, criterion has both a Greek plural, criteria, and a plural formed on the English pattern, criterions. However, the -s plural is rarely used; the plural ending in -a is the usual form: These are the criteria for the selection of candidates. Though criteria is properly a plural noun, it is increasingly used as a singular noun, most often in speech but also occasionally in edited prose: One criteria is that the candidate must be over 18. This use of criteria as a singular noun is generally considered incorrect.

Criteria, the plural of criterion, is not acceptable as a singular noun: this criterion is not valid; these criteria are not valid

Related Words

See standard.

Other Word Forms

• criterial adjective

Etymology

Origin of criterion

First recorded in 1605–15; from Greek kritḗrion “a standard,” equivalent to kri- variant stem of krī́nein “to separate, decide” + -tērion neuter suffix of means (akin to Latin -tōrium -tory ² )

Explanation

A criterion is a standard for judging something. If you are holding a cupcake competition, your number one criterion might be the smoothness of frosting. A criterion is a category for judging, but can also be a prerequisite for an achievement. It might be an application requirement for a teaching job that you have taught already for two years. If you haven’t, then we say you haven’t "met the criterion" for job experience. Likewise, if you establish the model for something, say you deliver an exciting, profound graduation speech, we might say you "set the criterion" for future speakers.

Example Sentences

We also pushed a new criterion for things that were very obviously A.I., like those tells I mentioned earlier.

From Slate • Apr. 1, 2026

However, the predetermined statistical criterion was not met in the primary endpoint.

From MarketWatch • Mar. 23, 2026

However, Pfizer said it is confident in the vaccine’s potential, noting that this criterion was met in the second pre-specified analysis and the clinically meaningful efficacy demonstrated in the trial.

From The Wall Street Journal • Mar. 23, 2026

With those prices, no wonder Luminate seems to have made popularity — and thus financial resources — a core criterion for eligibility.

From Los Angeles Times • Dec. 8, 2025

But the key facts were clear from De Nova Stella—that the object was fixed among the fixed stars and met every criterion to be regarded as a genuinely new star.

From "The Scientists" by John Gribbin

Related Words

• benchmark
• norm
• precedent
• principle
• proof
• touchstone
• yardstick