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Definition of ATP abbreviation from the Oxford Advanced Learner's Dictionary

 

ATP

 abbreviation
abbreviation
BrE BrE//ˌeɪ tiː ˈpi//
 
; NAmE NAmE//ˌeɪ tiː ˈpi//
 
(British English)
 
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the abbreviation for automatic train protection (a system for automatically stopping a train if the driver does not stop or go slower when a signal tells him/her to)