beltwayPronunciation: /ˈbɛltweɪ/Translate beltway | into Spanish Definition of beltway noun US a ring road. (Beltway) [often as modifier] Washington DC, especially as representing the perceived insularity of the US government:conventional Beltway wisdom[transferred use by association with the ring road encircling Washington]beltway in other Oxford dictionaries Definition of beltway in the US English dictionary