Use the word mechanism to describe a process that has been set up to accomplish a particular goal. If you’ve set up a method for dealing with your sister when she annoys you, then you have a mechanism in place for establishing peace with your sister. mechanism , in mechanical construction, the means employed to transmit and modify motion in a machine or any assemblage of mechanical parts. The chief characteristic of the mechanism of a machine is that all members have constrained motion; i.e., the parts can move only in a determinate manner relative to one another. The nature of these relative motions is determined largely by the number of parts and the way in which they are connected. Find out about catalytic reaction & catalyst. Check out its characteristics, types, examples, kinetics, & mechanism . Learn catalyzed vs. uncatalyzed reactions. The meaning of MECHANISM is a piece of machinery. How to use mechanism in a sentence.