Definitions
1.NounA game of chance in which a small ball is made to move round rapidly on a circle divided off into numbered (usually red and black) spaces. When the ball stops, it indicates the result of a variety of wagers permitted by the game.
2.NounAn instance of risk-taking, especially when the downside exceeds the upside (contrary to the game of roulette where only the wager is lost).
3.NounA small toothed wheel used by engravers to roll over a plate in order to produce rows of dots.
4.NounA similar wheel used to roughen the surface of a plate, as in making alterations in a mezzotint.
5.NounThe locus of a point on a plane curve that rolls without slipping along another fixed plane curve.
6.NounAny of the small incisions on a sheet of stamps, used as an alternative to perforations.
7.NounA cylindrical curler for the hair.
8.VerbTo separate or decorate by incisions made with a small toothed wheel."to roulette a sheet of postage stamps"