A planar geometrical figure included between two concentric circles.
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.
Any loud sound; the sound of numerous voices; a sound continued, repeated, or reverberated.
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 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.
A ridge or berm at a perimeter
The green border of a field, dug up in order to carry the earth onto other land to improve it.
A line of snow left behind by the edge of a snowplow’s blade.
A long snowbank along the side of a road.
A line of leaves etc heaped up by the wind.
A similar streak of seaweed etc on the surface of the sea formed by Langmuir circulation.
A line of gravel left behind by the edge of a grader’s blade.
A row of cut grain or hay allowed to dry in a field.
To arrange (e.g. new-made hay) in lines or windrows.