I have just looked at the path wiki. It covers the meaning of path as the shell environment variables used to find things e.g. executables in $PATH man pages in $MANPATH
However path is also the name used to define the location of a file in the role system e.g. it is the team used in Apple's Filesystem programming guide
I have edited the wiki to add that definition as a note.
1) Restrict the tag to the PATH environment variable as per the wiki and edit the questions to remove tags
2) Edit the wiki to make the file name more prominent?
And while on $PATH we need a canonical answer as how to set it. This answer seems a base is there a better start elsewhere (possibly also on a SuperUser question)