- distracted from the main subject, task, course, etc.: Sorry for not replying sooner—I’m an easily sidetracked guy with poor time management.
- (of a train) moved from the main track to a siding, where it stops temporarily: Rail officials agreed to move a sidetracked train after local residents complained of the noise, fumes, and vibrations.
- the simple past tense and past participle of sidetrack.
