trunk line

trunk line

n.

1. A direct line between two telephone switchboards.

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

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trunk line

Noun

1. a direct link between two distant telephone exchanges or switchboards

2. the main route or routes on a railway

Thesaurus

Noun	1.	trunk line - line that is the main route on a railway trunk route rail line, railway line, line - the road consisting of railroad track and roadbed
	2.	trunk line - a telephone line connecting two exchanges directly phone line, subscriber line, telephone circuit, telephone line, line - a telephone connection