1. One's personal appearance, especially an impressive appearance. "There's a ghee (fellow) with a perfect front for the shake (extortion). Give him a white tin (silver badge) and he'd pass for law (a policeman) anywhere." 2. A business office or other establishment used to cover up illegal activities. 3. An appearance of, and a reputation for, viciousness that inspires terror. "Some dude (fellow) with a few under his belt (several murder to his credit) is the front a shylock (loan shark) setup needs to lineup (control) the rabbits (borrowers)." 4. A suit of clothes; a wardrobe. 5. The warden's office; the administration building. 6. Any person who will speak or act for an underworld character when needed; a criminal lawyer.

- american underworld dictionary - 1950