noun Date: 1843 a transportation system (as an airline, railroad, or highway) handling long-distance through traffic, 2. a main supply channel (as for gas or oil), trunk 5b
TRUNK LINE
Meaning of TRUNK LINE in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012