a railway track between small towns on which small and fairly slow trains run. A track between larger towns, with larger and faster trains, is called a main line.
Synonyms and related words
Parts of railway and tram systems
artery
branch line
buffer
branch line
noun countable
US
Word Forms
singular
branch line
plural
branch lines
DEFINITIONS1
1
a railroad track between small towns on which small and fairly slow trains run. A track between larger towns, with larger and faster trains, is called a main line.