circle (ˈsɜːk^{ə}l) | |
—n | |
1. | maths a closed plane curve every point of which is equidistant from a given fixed point, the centre. Equation: (x --h)² + (y --k)² = r² where r is the radius and (h, k) are the coordinates of the centre; area πr²; circumference: 2πr |
2. | the figure enclosed by such a curve |
3. | theatre the section of seats above the main level of the auditorium, usually comprising the dress circle and the upper circle |
4. | something formed or arranged in the shape of a circle |
5. | a group of people sharing an interest, activity, upbringing, etc; set: golf circles; a family circle |
6. | a domain or area of activity, interest, or influence |
7. | a circuit |
8. | a process or chain of events or parts that forms a connected whole; cycle |
9. | great circle See also small circle a parallel of latitude |
10. | the ring of a circus |
11. | one of a number of Neolithic or Bronze Age rings of standing stones, such as Stonehenge, found in Europe and thought to be associated with some form of ritual or astronomical measurement |
12. | hockey See striking circle |
13. | See vicious circle a circular argument |
14. | come full circle See also vicious circle to arrive back at one's starting point |
15. | go round in circles, run round in circles to engage in energetic but fruitless activity |
—vb | |
16. | to move in a circle (around): we circled the city by car |
17. | (tr) to enclose in a circle; encircle |
[C14: from Latin circulus a circular figure, from circus ring, circle] | |
'circler | |
—n |
circle cir·cle (sûr'kəl)
n.
A ring-shaped structure or group of structures.
A line or process with every point equidistant from the center.
circle (sûr'kəl) Pronunciation Key
(click for larger image in new window) A closed curve whose points are all on the same plane and at the same distance from a fixed point (the center). |
circle
see full circle; go around (in circles); run around (in circles); run rings (circles) around; vicious circle.