main linenoun [ C ]
uk/ˌmeɪn ˈlaɪn/us/ˌmeɪn ˈlaɪn/an important railway route between large towns or cities:
the main line between New York and Philadelphia
Thesaurus: synonyms and related words
Railways & railway lines
- Amtrak
- artery
- buffer
- cable railway
- funicular
- grade crossing
- junction
- light railway
- metro
- monorail
- narrow-gauge
- railroad
- railroad tie
- rapid-transit
- RR
- signal
- subway
- switch
- switchback
- track
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