(1) 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"
(2) 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"
(3) Large mechanical apparatus with seats for children to ride on
(4) A road junction at which traffic streams circularly around a central island
"The accident blocked all traffic at the rotary"