Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun trunk_line

2 senses of trunk line

Sense 1
trunk line, trunk route -- (line that is the main route on a railway)
       => line, railway line, rail line -- (the road consisting of railroad track and roadbed)

Sense 2
trunk line -- (a telephone line connecting two exchanges directly)
       => telephone line, phone line, telephone circuit, subscriber line, line -- (a telephone connection)