Meanings
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1
noun
a long bridge, typically supported by a series of arches or spans, that carries a road or railway across a valley, low ground, or another obstacle
The railway crossed the valley on a stone viaduct supported by tall piers.
Thesaurus
Etymology
A modern formation from Latin via, 'road or way,' + duct, modeled on aqueduct. The second element comes ultimately from Latin ducere, 'to lead,' so the word names a structure that leads a road or railway across an obstacle.