verb

1. To exit from a train; to disembark

   “If you plan to detrain at the next stop, please begin gathering your belongings.”

2. To remove a passenger or passengers from a train; to evacuate passengers from a train.

   “Following the accident passengers were detrained through the rear cab.”

3. (of an athlete) to reduce one's training, particularly during the offseason, in preparation for a cycle of retraining.