A circular object, form, line, or arrangement. A small circular band, generally made of precious metal and often set with jewels, worn on the finger. A circular band used for carrying, holding, or containing something: a napkin ring. Sports A pair of circular metal bands suspended in the air for gymnastic exercises, on which balancing and swinging maneuvers are performed while holding the bands as motionless as possible. A circular movement or course, as in dancing. An enclosed, usually circular area in which exhibitions, sports, or contests take place: a circus ring. Sports A rectangular arena set off by stakes and ropes in which boxing or wrestling events are held. The sport of boxing. Games An enclosed area in which bets are placed at a racetrack. Bookmakers considered as a group. An exclusive group of people acting privately or illegally to advance their own interests: a drug ring. A political contest; a race. Botany An annual ring. Mathematics The area between two concentric circles; annulus. Mathematics A set of elements subject to the operations of addition and multiplication, in which the set is a commutative group under addition and associative under multiplication and in which the two operations are related by distributive laws. Any of the turns constituting a spiral or helix. Chemistry A group of atoms linked by bonds that may be represented graphically in polygonal form. Also called closed chain. To surround with or as if with a ring; encircle: Guests ringed the coffee table. To form into a ring or rings. To ornament or supply with a ring or rings: ringed the door knocker with a wreath of holly. To remove a circular strip of bark around the circumference of (a tree trunk or branch); girdle. To put a ring in the nose of (an animal). To hem in (animals) by riding in a circle around them. Games To toss a ring over (a peg), as in horseshoes. To form a ring or rings. To move, run, or fly in a spiral or circular course. To give forth a clear resonant sound.