1. One of the pieces of an area divided into nine sections.
2. A section of a rectangle that has been divided by two perpendicular pairs of parallel lines.
a) It's hard to win a game of tic-tac-toe when you start in the top, bottom or side nonants.
b) You'd better check your blind nonant before changing lanes.
c) Hey dude, check it out. My queen, bishop and rook have got all your king's nonants covered. Suffer looser.