{i} act of mustering; military enrollment; assembly; gathering up; list of names in a military unit
If someone or something passes muster, they are good enough for the thing they are needed for. I could not pass muster in his language If it doesn't pass muster, a radio station could have its license challenged
gather or bring together; "muster the courage to do something"; "she rallied her intellect"; "Summon all your courage
a gathering of military personnel for duty; "he was thrown in the brig for missing muster" call to duty, military service, jury duty, etc
If you muster something such as support, strength, or energy, you gather as much of it as you can in order to do something. He travelled around West Africa trying to muster support for his movement