dynamic braking: Meaning and Definition of

dynam'ic brak'ing

Pronunciation: [key]
— Railroads. Railroads.
  1. a braking system used on electric and diesel-electric locomotives in which the leads of the electric motors can be reversed so that the motors act as generators, offering resistance to the rotating wheel axles and dissipating kinetic energy, thereby retarding the locomotive.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.