# Definitions and Synonyms of *cross section* | Another word for *cross section* | What is *cross section? *

*Definition 1: (physics) the probability that a particular interaction (as capture or ionization) will take place between particles; measured in barns - [noun denoting attribute]*

*(**cross section* is a kind of ...) a measure of how likely it is that some event will occur; a number expressing the ratio of favorable cases to the whole number of cases possible

*cross section*is a kind of ...) a measure of how likely it is that some event will occur; a number expressing the ratio of favorable cases to the whole number of cases possible

*"the probability that an unbiased coin will fall with the head up is 0.5"**"if that phone call is for me, chances are it's my wife"*