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.
criterion definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
noun pl. criteria or criterions
a standard, rule, or test by which something can be judged; measure of value
Origin: ; from Classical Greek kritērion, means of judging ; from kritēs, judge; akin to kritikos: see critic
criterion definition by American Heritage Dictionary
noun pl. cri·te·ri·a
A standard, rule, or test on which a judgment or decision can be based. See Synonyms at standard
Origin: Greek kritērion, from kritēs, judge, from krīnein, to separate, judge; see krei- in Indo-European roots.
Related Forms:Usage Note:
Like the analogous etymological plurals agenda
and data, criteria
is widely used as a singular form. Unlike them, however, it is not yet acceptable in that use.