Meta-options are those command-line flags that tell the user how to use the application, rather than telling the application how to behave. They're the "What are my options?" options.
Every program you write should provide (at least) four of these, all of which print to standard output and then terminate the program immediately. Those four meta-options are:
Note that the names of the four options are not negotiable. That's what "standardized" means.
And, yes, those standardized names are much longer than -u, -h, -v, and -m. That's also intentional. Meta-options should need to be called only relatively infrequently, especially if your other options have been designed carefully and consistently, so they're easy to remember. And, because they'll be infrequent choices, meta-options ought to have longer invocations, leaving the shorter names available for things that users type all the time.
For example, -h and -v are far more useful as flags to specify horizontality or verticality, or height and velocity, or hairiness and verbosity. But if all your applications already use them to summon help and version information, you'll be stuck with -hor/-ver, or -hgt/-vel, or -hair/-verb.
Don't make up other names for these standard flags[*]. For example, using -hmo as the "help me, Obi-Wan" flag is cute. For about five seconds. After which, it becomes just another counter-intuitive, hard-to-remember, have-to-look-it-up-every-time obstacle to the user.