explain the meaning of process zombie (OS concepts)

How To Become A Zombie? "Wait for the child collect its return value with a wait()-type function. return EXIT_SUCCESS; A child that terminates, but has not been waited for becomes a "zombie." The kernel maintains a minimal set of information about the zombie process (PID, termination status, resource usage information) in order to allow the parent to later perform a wait to obtain information about the child. A zombie consumes a slot in the process table. If a parent process terminates, then its zombie children (if any) are adopted and cleaned by init