an alternating-current machine in which the average speed of normal operation is exactly proportional to the frequency of the system to which it is connected.
Decoding The PR MachineIf a PR rep is waving something shiny in their left hand, you might want to look to see what they're hiding in their right hand.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for synchronous machine
an electrical machine, whose rotating speed is proportional to the frequency of the alternating-current supply and independent of the load
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