- The definition of criterion is the standard by which something is judged or assessed.
An example of a criterion is the set of guidelines for a thesis which is used to determine whether your thesis was good or bad.
nounpl. cri·te·ri·a or cri·te·ri·ons
Origin of criterionGreek kritērion, from kritēs, judge, from krīnein, to separate, judge; see krei- in Indo-European roots.
- The plural form criterions also exists, but is much less common.
- The form criteria is sometimes used as a nonstandard singular form (as in a criteria, this criteria, and so on), with corresponding plural form criterias. In this use, it sometimes means “a single criterion”, sometimes “a set of criteria”.