Any loud sound; the sound of numerous voices; a sound continued, repeated, or reverberated.
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.
An exclusive group of people, usually involving some unethical or illegal practices.
An old English measure of corn equal to the coomb or half a quarter.
A large circular prehistoric stone construction such as Stonehenge.
A group of atoms linked by bonds to form a closed chain in a molecule.
A piece of food in the shape of a ring.
A circular group of people or objects.
A sound or appearance that is characteristic of something.
A flexible band partly or wholly encircling the spore cases of ferns.
A bird band, a round piece of metal put around a bird's leg used for identification and studies of migration.
A planar geometrical figure included between two concentric circles.
A chime, or set of bells harmonically tuned.
The resonant sound of a bell, or a sound resembling it.
A formation of various pieces of material orbiting around a planet or young star.
The open space in front of a racecourse stand, used for betting purposes.
The twenty-fifth Lenormand card.
A pleasant or correct sound.
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 diacritical mark in the shape of a hollow circle placed above or under the letter; a kroužek.
In a jack plug, the connector between the tip and the sleeve.
A round piece of (precious) metal worn around the finger or through the ear, nose, etc.
A place where some sports or exhibitions take place; notably a circular or comparable arena, such as a boxing ring or a circus ring; hence the field of a political contest.
Either of the pair of clamps used to hold a telescopic sight to a rifle.
A hierarchical level of privilege in a computer system, usually at hardware level, used to protect data and functionality (also protection ring).
An algebraic structure as above, but only required to be a semigroup under the multiplicative operation, that is, there need not be a multiplicative identity element.
A telephone call.
A burner on a kitchen stove.
An instrument, formerly used for taking the sun's altitude, consisting of a brass ring suspended by a swivel, with a hole at one side through which a solar ray entering indicated the altitude on the graduated inner surface opposite.
To produce (a sound) by ringing.
To produce the sound of a bell or a similar sound.
To telephone (someone).
To steal and change the identity of (cars) in order to resell them.
To make (a bell, etc.) produce a resonant sound.
To ride around (a group of animals, especially catle) to keep them milling in one place; hence (intransitive), to work as a drover, to muster cattle.
to resound, reverberate, echo.
Of a bell, etc., to produce a resonant sound.
Of something spoken or written, to appear to be, to seem, to sound.
To surround or fit with a ring, or as if with a ring.
To produce music with bells.
To enclose or surround.
To attach a ring to, especially for identification.
To make an incision around; to girdle; to cut away a circular tract of bark from a tree in order to kill it.
To rise in the air spirally.
Repeated play on a radio station, etc.
The step during takeoff when the pilot commands the vehicle to lift the nose wheel off the ground during the takeoff roll. (see also: V2)
A regular variation in a sequence, such as to even-out wear, or people taking turns in a task; a duty roster.
A single complete cycle around a centre or an axis.
The act of turning around a centre or an axis.
An operation on a metric space that is a continuous isometry and fixes at least one point.
The set of starting pitchers of a team.
The earth's rotation about its axis is responsible for its being slightly oblate rather than a sphere.