trunk line
noun
1 trunk line
Line that is the main route on a railway.
synonym: trunk route.
2 trunk line
A telephone line connecting two exchanges directly.
Moby thesaurus: L, WATS, WATS line, branch, cable, cable railway, co-ax, coaxial cable, cog railway, concentric cable, el, electric railway, elevated, elevated railway, embankment, feeder, feeder line, gravity-operated railway, horse railway, junction ... show more.
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