How to define a variable in the suite config file in FitNesse

how to define a variable in FitNesse´ suite config file which then can be used within the FitNesse tests? I´m looking for an equivalent to define a variable via !define MY_VAR {some value}

Thanks in advance, Christian

Solution

As indicated by Mike Stockdale and Markus Gaertner:

FitNesse wiki variables can be defined:

With !define on the current page
With !define on any ancestor page
In the system.properties file
As environment variables
As a -D argument at the command line.

Taking that list to the next step, I would ask:

why do you want these values in a suite config file?
What do you mean by a suite config file?
What is your ultimate goal?