noun
1. line that is the main route on a railway
• Syn: ↑trunk route
• Hypernyms: ↑line, ↑railway line, ↑rail line
2. a telephone line connecting two exchanges directly
• Hypernyms: ↑telephone line, ↑phone line, ↑telephone circuit, ↑subscriber line, ↑line
Useful english dictionary. 2012.