The meanings for the acronym in the wizard Shazam’s name vary between Captain Marvel characters. The main meaning refers to Captain Marvel's Elders, which include Solomon, Hercules, Atlas, Zeus, Achilles and Mercury. In the other cases, “Shazam” lists the deities that empower the wizard, Mary Marvel and Black Adam.
Shazam, formerly called Captain Marvel, is a super hero and protector of Fawcett City within the DC Comics Universe. His public identity is Billy Batson, a young boy and apprentice to a wizard named Shazam. When needed, Billy speaks the word "Shazam," gets struck by a lightning bolt and is transformed into a super adult.