Discern is defined as to recognize someone or something as different from someone or something else.(verb)
An example of discern is being able to pick a friend out of a crowd.
See discern in Webster's New World College Dictionary
Origin: ME discernen < OFr discerner < L discernere < dis-, apart + cernere, to separate: see harvest
See discern in American Heritage Dictionary 4
verb dis·cerned, dis·cern·ing, dis·cerns verb, transitive
Origin: Middle English discernen
Origin: , from Old French discerner
Origin: , from Latin discernere, to separate
Origin: : dis-, apart; see dis-
Origin: + cernere, to perceive; see krei- in Indo-European roots.
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