noun A small circular band, typically of precious metal and often set with one or more gemstones, worn on a finger as an ornament or a token of marriage, engagement, or authority. A ring-shaped or circular object. (fried onion rings) An enclosed space, surrounded by seating for spectators, in which a sport, performance, or show takes place. (a circus ring) A group of people drawn together due to a shared interest or goal, especially one involving illegal or unscrupulous activity. (the police had been investigating the drug ring) another term for closed chain A set of elements with two binary operations, addition and multiplication, the second being distributive over the first and associative.
verb Surround (someone or something), especially for protection or containment. (the courthouse was ringed with police) Put a circular band through the nose of (a bull, pig, or other farm animal) to lead or otherwise control it.
noun An act of causing a bell to sound, or the resonant sound caused by this. (there was a ring at the door)
verb Make a clear resonant or vibrating sound. (a shot rang out) Call by telephone. (I rang her this morning) (of a place) resound or reverberate with (a sound or sounds) (the room rang with laughter)