Learner's definition of MECHANISM
1 : a piece of machinery : a mechanical part or group of parts having a particular function 2 : a process or system that is used to produce a particular result
Scientists are studying the body's mechanisms for controlling weight.
There is no mechanism in place for enforcing the new law.
a legal mechanism to prevent lobbyists from exerting unfair influence
3 : a way of acting, thinking, or behaving that helps or protects a person in a specified way