Meaning of trunk line | Babel Free

Definitions

1. A main railway line which usually forms the backbone of a rail network.
2. The main line of a canal, from which other sections diverge.
3. A main telephone line.

Examples

“But the states were generally concerned with the location of trunk lines and left it to cities and counties to worry about branch lines.”

“Then he put a trunk line phone call through to the nearest township and asked the Police to send someone out as soon as possible.”

CEFR level