a fluid coupling in which three or more rotors are used, one of which can be checked so that output torque is augmented and output speed diminished.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
British Dictionary definitions for torque converter
a hydraulic device for the smooth transmission of power in which an engine-driven impeller transmits its momentum to a fluid held in a sealed container, which in turn drives a rotor: Also called: hydraulic coupling
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012