Of ill fame; famous or noted for badness of any kind; notoriously evil; of vile character or quality; odious; detestable: applied to persons or things.Involving or attributing infamy; branded, or that brands, with infamy: as, an infamous crime; infamous punishment.In the commonlaw rule of evidence disqualifying convicts to testify as witnesses or serve as jurors, an offense a conviction of which would at common law disqualify the person as a witness or juror, because creating a strong presumption against truthfulness; in general, an offense punishable in a state prison.In the constitutional provision that no one can be held to answer for an infamous offense without presentment or indictment by grand jury, a crime punishable capitally or by imprisonment in a state prison or penitentiary, with or without hard labor. In this sense restricted by some authorities to those offenses which involve falsehood and are calculated to affect injuriously the public administration of justice. Synonyms Wicked, Heinous, etc. (see atrocious); disgraceful, shameful, grossly dishonorable, nefarious, execrable, ignominious.