roundabout -
deviating from a straight course; "a scenic but devious route"; "a long and circuitous journey by train and boat"; "a roundabout route avoided rush-hour traffic"
indirect not direct in spatial dimension; not leading by a straight line or course to a destination; "sometimes taking an indirect path saves time"; "you must take an indirect course in sailing"
roundabout -
marked by obliqueness or indirection in speech or conduct; "the explanation was circuitous and puzzling"; "a roundabout paragraph"; "hear in a roundabout way that her ex-husband was marrying her best friend"
A roundabout is a type of circular junction in which road traffic must travel in one direction around a central island. Signs usually direct traffic entering the circle to slow down and give the right of way to drivers already in the circle. These junctions are sometimes called modern roundabouts in order to emphasise the distinction from older circular junction types which had different design characteristics and rules of operation.
OmegaWiki Dictionary
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roundabout A type of circular intersection in which traffic must travel in one direction around a central island.