premillennial adjective 2noun 1forms 1 adjective2 •Occurring before, or in anticipation of, a new millennium.He [David Fincher] hit his stride again with “Fight Club,” […] Still, this adrenalized jolt of designer nihilism tapped right into late-capitalist disaffection and premillennial anxiety. — 2009 •Pertaining to the belief that the Second Coming will take place before the millennium. noun1 •One who believes in the advent of Christ before the new millennium. formspremillennials