What is the meaning of Ghoul?

A demon said to feed on corpses.

A graverobber.

A person with an undue interest in death and corpses, or more generally in things that are revolting and repulsive.

A person with a callous or uncaring attitude to human life and suffering, particularly when prioritizing economic concerns.

ghoul (a spirit said to feed on corpses)

Source: wiktionary.org