To transfer to a siding from a main line of track.
- To divert from a main issue or course: I was sidetracked from my work by an unexpected visitor.
- To delay or block the progress of deliberately: "a bill that would sidetrack food irradiation in this country” ( Alexis Beck).
- To switch from a main railroad track to a siding.
- To deviate from a main issue or course.
- To run into a siding.
- A railroad siding.