beltway

Từ điển WordNet v3.1 - WordNet Dictionary

noun

a highway that encircles an urban area so that traffic does not have to pass through the center
• Syn:
bypass, ring road, ringway
• Derivationally related forms:
bypass (for: bypass)
• Regions:
Britain (for: ringway), Britain (for: ring road)
• Hypernyms:
highway, main road