- railway, railroad, railroad line, railway line, railway system - line that is the commercial organization responsible for operating a railway system
--1 is a kind of line
--1 has particulars:cable railway, funicular, funicular railway; cog railway, rack railway; elevated railway, elevated railroad, el, overhead railway; metro, subway, tube, underground; monorail; rail; scenic railway - line, railway line, rail line - the road consisting of railroad track and roadbed
--2 is a kind of road, route
--2 has parts: railroad bed; railroad track, railroad, railway
--2 has particulars:branch line, spur track, spur; trunk line, trunk route