main line

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main line

1. Railways
a. the trunk route between two points, usually fed by branch lines
b. (as modifier): a main-line station
2. US a main road

Main Line

 

(Russian, magistral’; from Latin magistralis, “leading”).

(1) The main route, the primary line in communications (railroad main line, waterway main line).

(2) A wide and heavily traveled street in a large city.

(3) The main cable or wire in an electrical circuit or in tele-graph and telephone communications.

(4) The main pipe in a sewerage line or water system.