Flyunder
noun ·Rare ·Advanced level
Definitions
- 1 A road or rail underpass.
"An essential part of the Tilbury line electrification scheme is the remodelling to be carried out by the Eastern Region in the Barking area, which among other major works includes a new single-track flyover and a new single-track flyunder to carry the westbound District Line over and under the Fenchurch Street-Southend line, besides a main-line flyover and extensive permanent way and platform alterations."
Synonyms
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More examples"An essential part of the Tilbury line electrification scheme is the remodelling to be carried out by the Eastern Region in the Barking area, which among other major works includes a new single-track flyover and a new single-track flyunder to carry the westbound District Line over and under the Fenchurch Street-Southend line, besides a main-line flyover and extensive permanent way and platform alterations."
Etymology
From fly + under, to contrast with earlier flyover.
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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.