[bak-gam-uh
n, bak-gam-] 
| 1. | a game for two persons played on a board having two tables or parts, each marked with 12 points, and with both players having 15 pieces that are moved in accordance with throws of the dice. |
| 2. | a victory at this game, esp. one resulting in a tripled score. |
| 3. | to defeat at backgammon, esp. to win a triple score over. |
| back·gam·mon (bāk'gām'ən) n. A board game for two persons, played with pieces whose moves are determined by throws of dice. [back1 + gammon1.] |
backgammon
See bignum, moby, pseudoprime.
[The Jargon File]