1, 3. Standard, criterion refer to the basis for making a judgment. A standard is an authoritative principle or rule that usually implies a model or pattern for guidance, by comparison with which the quantity, excellence, correctness, etc., of other things may be determined: She could serve as the standard of good breeding. A criterion is a rule or principle used to judge the value, suitability, probability, etc., of something, without necessarily implying any comparison: Wealth is no criterion of a person's worth.

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