The definition of dishonest is a person who cheats or lies.(adjective)
An example of dishonest is a man who has a wife and a mistress on the side; a dishonest man.
See dishonest in Webster's New World College Dictionary
Origin: ME < OFr deshoneste, altered (after des-, dis-) < L dehonestus: see de- & honest
See dishonest in American Heritage Dictionary 4
Origin: Middle English dishoneste, dishonorable
Origin: , from Old French deshoneste
Origin: , probably from Medieval Latin *dishonestus
Origin: : Latin dis-, dis-
Origin: + Latin honestus, honorable; see honest.
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