De*train" (?), v. i. & t. To alight, or to cause to alight, from a railway train. [Eng.] London Graphic.

• to exit from a train; to disembark If you plan to detrain at the next stop, please begin gathering your belongings.
  
• For an athlete, to reduce one's training, particularly during the offseason, in preparation for a cycle of retraining.