A ~ is someone whose job is to repair and maintain machines and engines, especially car engines.
If you smell gas fumes or burning, take the car to your ~...
The ~s of a process, system, or activity are the way in which it works or the way in which it is done.
What are the ~s of this new process?...
N-PLURAL: usu the N of n
Mechanics is the part of physics that deals with the natural forces that act on moving or stationary objects.
He has not studied ~s or engineering.