trunk line

Definition of Trunk Line in English :

1. trunk line, trunk route

line that is the main route on a railway

2. trunk line

a telephone line connecting two exchanges directly

WordNet Lexical Database for English. Princeton University. 2010.

Trunk Line

noun

1.

a direct link between two telephone exchanges or switchboards that are a considerable distance apart

2.

the main route or routes on a railway

a main line of a railroad, canal, telephone system, etc.

n.

1. A direct line between two telephone switchboards.

2. The main line of a communications or transportation system.