Overpass vs. Underpass

Overpassnoun

A section of a road or path that crosses over an obstacle, especially another road, railway, etc.

Overpassverb

To pass above something, as when flying or moving on a higher road.

Overpassverb

(transitive) To exceed, overstep, or transcend a limit, threshold, or goal.

Overpassverb

(transitive) To disregard, skip, or miss something.

Overpassverb

To go over or beyond; to cross; as, to overpass a river; to overpass limits.

Overpassverb

To pass above; - of roadways and other paths; as, the highway overpasses the railroad tracks.

Overpassverb

To pass over; to omit; to overlook; to disregard.

Overpassverb

To surpass; to excel.

Overpassverb

To pass over, away, or off.

Overpassnoun

A road or other pathway which passes over another road, railroad, or other path; as, he stopped on the street under the railroad overpass.

Overpassnoun

bridge formed by the upper level of a crossing of two highways at different levels;

Overpass

An overpass (called an overbridge or flyover in the United Kingdom and some other Commonwealth countries) is a bridge, road, railway or similar structure that crosses over another road or railway. An overpass and underpass together form a grade separation.

Underpassnoun

A passage that crosses a road, railroad or similar obstacle in a tunnel underneath it.

Underpassnoun

an underground tunnel or passage enabling pedestrians to cross a road or railway

Underpassnoun

a road or pedestrian tunnel passing under a road or railway.