Definitions by Jeff Carter

catching z's

To sleep, rest, or take a nap

I was catching z's during study hall.

catching z's by Jeff Carter January 17, 2005

! 

In the mathematical sense, it means factorial. The definition of factorial is as follows: n*(n-1)*(n-2)*(n-3)*(n-...), (n-1) > 0.

The factorial of 5 = 5*4*3*2*1 = 120.

! by Jeff Carter January 17, 2005