Hello Anshara,
I don't know where you could check the meaning of all possible parameters, all at once.
However, you can access the transaction RZ11, type the parameter name, hit "display" and then hit "documentation". This should work for most of the parameters, and it will explain what the parameter does, including syntax and possible values.
For the parameters that are not documented on RZ11, you can try to find SAP notes describing them.
Regards,
Isaias