eli5: What (if any) is the difference between an engine and a motor?

Question

I’ve heard these words used interchangeably over the years, with engine being more prevalent. Is there any difference? Why is a small gas-driven device like a lawnmower commonly said to have a motor, while what is under the hood of a car is almost always referred to as an engine?

In: 160

Answer 1

It seems there are multiple definitions for both. My understanding has always been that all engines are motors but not all motors are engines. According to google they basically have the same definition (converting energy to motion) but I’ve never heard someone call an electric motor an engine.