Meanings
plural flyunders
- A road or rail underpass.
1 more example
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.
1956 July, “New Works on District Line, L.T.”, in Railway Magazine, page 485
Synonyms & antonyms
Origin
From fly + under, to contrast with earlier flyover.
Full word history & related roots →Translations
Dutch dive-under
- dive-underroad or rail underpass
Finnish alikulkutunneli
- alikulkutunneliroad or rail underpass
German Unterführung, Straßenunterführung
- Unterführungroad or rail underpass
- Straßenunterführungroad or rail underpass
- Eisenbahnunterführungroad or rail underpass
Polish przejście podziemne
- przejście podziemneroad or rail underpass
Swedish vägport, järnvägsport
- vägportroad or rail underpass
- järnvägsportroad or rail underpass
Cite this entry
flyunder. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/flyunder
“flyunder.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/flyunder. Accessed November 2, 2026.
WatkinsX Dictionary, s.v. “flyunder,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/flyunder.
Source: flyunder on Wiktionary, CC BY-SA 4.0.