Function: noun
Date: 1775
1 : an agency (as water or steam) used to impart motion especially to machinery
2 : something (as a locomotive or a motor) that provides motive power to a system
MOTIVE POWER
Meaning of MOTIVE POWER in English
Merriam Webster Collegiate English Dictionary. Merriam Webster - Энциклопедический словарь английского языка. 2012