0 a road junction (= where roads come together) consisting of a main road that goes through the middle of a roundabout (= a junction where traffic must go around a circular area in the middle):
A throughabout is a variant of the signalized roundabout.
Work to convert a controversial throughabout junction into a conventional roundabout will begin later this year.
Yeovil's new throughabout is up and running.
One of the ring road's busiest roundabouts is going to be turned into a throughabout.
