according to wikipedia
In computing, a process is an instance of a computer program that is being executed. It contains the program code and its current activity. Depending on the operating system (OS), a process may be made up of multiple threads of execution that execute instructions concurrently.
according to this definition a kernel should be a process?
A kernel is bigger than a process. It creates and manages processes. A kernel is the base of an operating System to make it possible to work with processes.
Kernel is a comprehensive/complex process, that handles all other tasks(threads) in both kernel and user space
Kernel's PID is 0, and that triggers all other processes(Kernel/User), directly(children) and indirectly(child handling other subsequent children).
Kernel runs the scheduler, which is the core part of task/process management.
To see the kernel Processes that are spawned by kernel
ps -caefL | grep -v grep | grep "\[\|PPID" | grep root
to see the user space processes,
ps -caefL | grep -v grep | grep -v "\["
You will not be able to see the line of 0th PID, which is the kernel(the driving force)
Good to say that kernel is, "device driver for the CPU"