(intransitive) Of a bell, etc., to produce a resonant sound. / (transitive) To make (a bell, etc.) produce a resonant sound. / (transitive) To produce (a sound) by ringing.

(mathematical analysis, measure theory) A family of sets that is closed under finite unions and differences.

A circumscribing object, (roughly) circular and hollow, looking like an annual ring, earring, finger ring etc. / A round piece of (precious) metal worn around the finger or through the ear, nose, etc.

(transitive) To enclose or surround. / (transitive, figuratively) To make an incision around; to girdle; to cut away a circular tract of bark from a tree in order to kill it.

The resonant sound of a bell, or a sound resembling it. / (figuratively) A pleasant or correct sound. / (figuratively) A sound or appearance that is characteristic of something.

(algebra) An algebraic structure which consists of a set with two binary operations: an additive operation and a multiplicative operation, such that the set is an abelian group under the additive operation, a monoid under the multiplicative operation, and such that the multiplicative operation is distributive with respect to the additive operation.

A surname originating as an occupation for a maker of rings as jewelry or as in harness. / A parish of County Waterford, Ireland.

(transitive) To encircle, to surround in a ring, engirdle.

To make a phone call to (this place). / (transitive) To celebrate by ringing of bells or as if by ringing of the bells.

A replacement made at the last minute, usually in a sporting context. / An outsider.