1. (noun) circle
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"
2. (noun) set, circle, band, lot
an unofficial association of people or groups
"the smart set goes there"; "they were an angry lot"
3. (noun) circle
something approximating the shape of a circle
"the chairs were arranged in a circle"
4. (noun) lap, circle, circuit
movement once around a course
"he drove an extra lap just for insurance"
5. (noun) traffic circle, circle, rotary, roundabout
a road junction at which traffic streams circularly around a central island
"the accident blocked all traffic at the rotary"
6. (noun) R-2, Mexican valium, rophy, rope, roofy, roach, forget me drug, circle
street names for flunitrazepan
7. (noun) circle, dress circle
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"
8. (verb) circle, round
any circular or rotating mechanism
"the machine punched out metal circles"
9. (verb) circle
travel around something
"circle the globe"
10. (verb) circle, circulate
move in circles
11. (verb) encircle, circle
form a circle around
"encircle the errors"
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Definition of 'circle' 
