automatic transmission WORD ORIGIN noun an automotive transmission requiring either very little or no manual shifting of gears. Liberaldictionary.com
Origin of automatic transmission First recorded in 1945–50 Also called automatic, automatic drive. Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019 British Dictionary definitions for automatic drive automatic transmission noun a transmission system in a motor vehicle, usually incorporating a fluid clutch, in which the gears change automatically 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