What is the meaning of roundabout?

noun

• A road junction at which traffic streams circularly around a central island.
  • usage: "the accident blocked all traffic at the rotary"
  • synonyms: traffic circle, circle, rotary
• A large, rotating machine with seats for children to ride or amusement.
  • synonyms: carousel, carrousel, merry-go-round, whirligig

adjective

• Marked by obliqueness or indirection in speech or conduct.
  • usage: "the explanation was circuitous and puzzling"; "a roundabout paragraph"; "hear in a roundabout way that her ex-husband was marrying her best friend"
  • synonyms: circuitous
• Deviating from a straight course.
  • usage: "a scenic but devious route"; "a long and circuitous journey by train and boat"; "a roundabout route avoided rush-hour traffic"
  • synonyms: devious, circuitous