# Circle vs. Circumference

## Difference Between Circle and Circumference

#### Circlenoun

(geometry) A two-dimensional geometric figure, a line, consisting of the set of all those points in a plane that are equally distant from a given point (center).

*The set of all points (x, y) such that (x-1)*

^{2}+ y^{2}*r*

^{2}is a circle of radius r around the point (1, 0).#### Circumferencenoun

(geometry) The line that bounds a circle or other two-dimensional figure

#### Circlenoun

A two-dimensional geometric figure, a disk, consisting of the set of all those points of a plane at a distance less than or equal to a fixed distance (radius) from a given point.

#### Circumferencenoun

(geometry) The length of such a line

#### Circlenoun

Any thin three-dimensional equivalent of the geometric figures.

*Put on your dunce-cap and sit down on that circle.*

#### Circumferencenoun

(obsolete) The surface of a round or spherical object

#### Circlenoun

A curve that more or less forms part or all of a circle.

*move in a circle*

#### Circumferencenoun

(graph theory) The length of the longest cycle of a graph

#### Circlenoun

Orbit.

#### Circumferenceverb

To include in a circular space; to bound.

#### Circlenoun

A specific group of persons; especially one who shares a common interest.

*inner circle;*

*circle of friends*

#### Circumferencenoun

the size of something as given by the distance around it

#### Circlenoun

(cricket) A line comprising two semicircles of 30 yards radius centred on the wickets joined by straight lines parallel to the pitch used to enforce field restrictions in a one-day match.

#### Circumferencenoun

the length of the closed curve of a circle

#### Circlenoun

(Wicca) A ritual circle that is cast three times deosil and closes three times widdershins either in the air with a wand or literally with stones or other items used for worship.

#### Circlenoun

(South Africa) A traffic circle or roundabout.

#### Circlenoun

(obsolete) Compass; circuit; enclosure.

#### Circlenoun

(astronomy) An instrument of observation, whose graduated limb consists of an entire circle. When fixed to a wall in an observatory, it is called a mural circle; when mounted with a telescope on an axis and in Y's, in the plane of the meridian, a meridian or transit circle; when involving the principle of reflection, like the sextant, a reflecting circle; and when that of repeating an angle several times continuously along the graduated limb, a repeating circle.

#### Circlenoun

A series ending where it begins, and repeating itself.

#### Circlenoun

(logic) A form of argument in which two or more unproved statements are used to prove each other; inconclusive reasoning.

#### Circlenoun

Indirect form of words; circumlocution.

#### Circlenoun

A territorial division or district.

*The ten Circles of the Holy Roman Empire were those principalities or provinces which had seats in the German Diet.*

#### Circlenoun

(in the plural) A bagginess of the skin below the eyes from lack of sleep.

*''After working all night, she had circles under her eyes.*

#### Circleverb

(transitive) To travel around along a curved path.

#### Circleverb

(transitive) To surround.

#### Circleverb

(transitive) To place or mark a circle around.

*Circle the jobs that you are interested in applying for.*

#### Circleverb

(intransitive) To travel in circles.

*Vultures circled overhead.*

#### Circlenoun

ellipse in which the two axes are of equal length; a plane curve generated by one point moving at a constant distance from a fixed point;

*he calculated the circumference of the circle*

#### Circlenoun

an unofficial association of people or groups;

*the smart set goes there*

*they were an angry lot*

#### Circlenoun

something approximating the shape of a circle;

*the chairs were arranged in a circle*

#### Circlenoun

movement once around a course;

*he drove an extra lap just for insurance*

#### Circlenoun

a road junction at which traffic streams circularly around a central island;

*the accident blocked all traffic at the rotary*

#### Circlenoun

street names for flunitrazepan

#### Circlenoun

a curved section or tier of seats in a hall or theater or opera house; usually the first tier above the orchestra;

*they had excellent seats in the dress circle*

#### Circlenoun

any circular or rotating mechanism;

*the machine punched out metal circles*

#### Circleverb

travel around something;

*circle the globe*

#### Circleverb

move in circles

#### Circleverb

be around;

*Developments surround the town*

*The river encircles the village*

#### Circleverb

form a circle around;

*encircle the errors*