EXAMPLES FROM THE WEB FOR SIDING
They awoke one morning to find the car on a siding at the One Girl mine.
And here was Claire siding with Marion against him; and calling him a ruffian!
The private signal was hoisted at the siding, and the train stopping, they both got in.
There were long lines of cars, some upon the main track, others on the siding.
The Faribault House, covered with siding, is still standing.
Even you are siding with grandmother and suspecting me of breaking my word.
Ryall's carriage was taken off the train and drawn on to a siding.
This was served the same way, and at Resaca the cars were run on a siding.
Presently they went back and turned their wagons into the siding and began to unhitch.
The car stood on the siding wondering what he was for and what he was to do.
c.1600, "a taking of sides in a conflict or debate," verbal noun from side. First attested 1825 in the railroad sense; 1829, American English, in the architectural sense of "boarding on the sides of a building."