Definition of beltway noun from the Oxford Advanced Learner's Dictionary

 

beltway

 noun
noun
BrE BrE//ˈbeltweɪ//
 
; NAmE NAmE//ˈbeltweɪ//
 
(US English) Types of road
 
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a ring road, especially the one around Washington DC Traffic was snarled as a two-mile stretch of the beltway was closed for four hours. See related entries: Types of road
See the Oxford Advanced American Dictionary entry: beltway