loop line

noun

A secondary route which leaves a mainline, following a different route to the main line, before rejoining it several miles further on.

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Meanings

nounloop line (plural loop lines)

plural loop lines · alternative loopline

  1. rail transportA secondary route which leaves a mainline, following a different route to the main line, before rejoining it several miles further on.
  2. A secondary route which forms a loop between two main lines, so that trains using it return to the same place.
Cite this entry
APA

loop line. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/loop%20line

MLA

“loop line.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/loop%20line. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “loop line,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/loop%20line.

Source: loop line on Wiktionary, CC BY-SA 4.0.