mean free path
Definition of mean free path
: the average distance traversed between collisions by particles (as molecules of a gas or free electrons in metal) in a system of agitated particles
First Known Use of mean free path
Learn More about mean free path
Britannica.com: Encyclopedia article about mean free path
Seen and Heard
What made you want to look up mean free path? Please tell us where you read or heard it (including the quote, if possible).