Noun | 1. | ![]() railroad track, railway, railroad - a line of track providing a runway for wheels; "he walked along the railroad track" |
2. | siding - material applied to the outside of a building to make it weatherproof building material - material used for constructing buildings clapboard, weatherboard, weatherboarding - a long thin board with one edge thicker than the other; used as siding by lapping one board over the board below |