access shell alias with dmenu

I have a collection of bash commands (one liners) that I use on a regular basis to open new shells or start programs with a given set of arguments. As I use dmenu, I'd like to be able to use those commands from my shell and from dmenu. So defining an alias in my .bashrc isn't enough, I have to put these commands in a dedicated file. The file needs then to be executable and stored in a $PATH known to dmenu. If I do so, the alias becomes useless because the shell will find the executable. But that means I have to create one file per command. It's annoying. Is there a way to store all those commands in one file (or at least in a more convenient way) so that they can be accessed via shell and dmenu? Maybe something like an alias file read by dmenu...