The noun circle has 8 senses (first 4 from tagged texts)
1. (15) 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. (10) set, circle, band, lot -- (an unofficial association of people or groups; "the smart set goes there"; "they were an angry lot")
3. (4) circle -- (something approximating the shape of a circle; "the chairs were arranged in a circle")
4. (2) lap, circle, circuit -- (movement once around a course; "he drove an extra lap just for insurance")
5. 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. R-2, Mexican valium, rophy, rope, roofy, roach, forget me drug, circle -- (street names for flunitrazepan)
7. 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. circle, round -- (any circular or rotating mechanism; "the machine punched out metal circles")
Overview of verb circle
The verb circle has 4 senses (first 3 from tagged texts)
1. (6) circle -- (travel around something; "circle the globe")
2. (4) circle, circulate -- (move in circles)
3. (1) surround, environ, encircle, circle, round, ring -- (be around; "Developments surround the town"; "The river encircles the village")
4. encircle, circle -- (form a circle around; "encircle the errors")