base tunnel

noun

A tunnel driven through the base of a mountain pass, rather than through the upper slopes of the mountains.

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Meanings

nounbase tunnel (plural base tunnels)

plural base tunnels

  1. civil engineeringA tunnel driven through the base of a mountain pass, rather than through the upper slopes of the mountains.
Cite this entry
APA

base tunnel. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/base%20tunnel

MLA

“base tunnel.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/base%20tunnel. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “base tunnel,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/base%20tunnel.

Source: base tunnel on Wiktionary, CC BY-SA 4.0.