the aggregation of things (pedestrians or vehicles) coming and going in a particular locality during a specified period of time
buying and selling; especially illicit trade
social or verbal interchange (usually followed by `with')
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
an unofficial association of people or groups
travel around something
move in circles
movement once around a course
any circular or rotating mechanism
