noun

1. a gambling game played by rolling a small ball around a shallow bowl with an inner disk (roulette wheel) revolving in the opposite direction: the ball finally comes to rest in one of the red or black, numbered compartments into which this disk is divided, thus determining the winning bets
2. a small toothed wheel attached to a handle, for making rows of marks or dots, as in engraving, or incisions, as between postage stamps
3. a series of small, consecutive incisions made in the paper between the stamps in a sheet of stamps, to facilitate their separation

Etymology: Fr < OFr roelette, dim. of roele, small wheel < LL rotella, dim. < L rota, wheel: see roll

transitive verb rouletted -·let′·ted, rouletting -·let′·ting