Under-bridge

Also dial. -brigg. [UNDER-¹ 5 c.] A bridge spanning an opening beneath a road or railway.

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1828. Carr, Craven Gloss., Under-brigg, an arch under a road to open a communication between two fields.

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1876. Encycl. Brit., IV. 284/2. The over and under bridges of railways.

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1891. Daily News, 19 June, 6/1. The state of the under-bridges throughout the [railway] system.

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