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

 

underpass

 noun
noun
BrE BrE//ˈʌndəpɑːs//
 
; NAmE NAmE//ˈʌndərpæs//
 
Features of roads, Railway tracks and stations
 
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a road or path that goes under another road or railway/railroad track compare overpass See related entries: Features of roads, Railway tracks and stations
See the Oxford Advanced American Dictionary entry: underpass