How can you identify zombie processes on the Linux system? code example

Example: How can you identify zombie processes on the Linux system

Zombie processes can be found easily with the ps -l command. 
Within the ps output there is a STAT column which will show the 
processes current status, a zombie process will have Z as the status. 
In addition to the STAT column zombies commonly have the words 
<defunct> in the CMD column as well.