IN'FAMOUS, a. [L. infamis; infamo, to defame; in and fama, fame.]1. Of ill report, emphatically; having a reputation of the worst kind; publicly branded with odium for vice of guilt; base; scandalous; notoriously vile; used of persons; as an infamous liar; an infamous rake or gambler.2. Odious; detestable; held in abhorrence; that renders a person infamous rake or gambler.3. Branded with infamy by conviction of a crime. An infamous person cannot be a witness.