Oxford Advanced American Dictionary

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

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highway

noun
highway pronunciation English ˈhaɪweɪ highway pronunciation American ˈhaɪweɪ
 
1 (especially North American English) a main road for travelling long distances, especially one connecting and going through cities and townsan interstate highwayHighway patrol officers closed the road.2 (British English, formal) a public roadA parked car was obstructing the highway.
Idioms

highway robbery

(informal, especially North American English) = daylight robbery at daylight
 more at my way or the highway at way noun