circle definition

1. 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
• examples: he calculated the circumference of the circle
2. something approximating the shape of a circle
• examples: the chairs were arranged in a circle
3. a curved section or tier of seats in a hall or theater or opera house; usually the first tier above the orchestra
• examples: they had excellent seats in the dress circle
4. any circular or rotating mechanism
• examples: the machine punched out metal circles
5. travel around something
• examples: circle the globe
6. move in circles