Final answer:
The best definition for 'macabre' is related to horrific and deadly scenes with a supernatural aspect, embodying elements such as death and decay.
Step-by-step explanation:
The definition that best suits macabre is 'Horrific deadly scenes involving mysteries of the supernatural.' The macabre is characterized by elements of death, decay, and horror and often involves the supernatural or gruesome aspects. The adjective conveys an atmosphere of the grim or ghastly and can be applied to arts, literature, and entertainment that explores the darker side of life and the unease associated with mortality.
For example, the statement 'LibreTexts™ sorrow, decay, and death...' refers to the grim and often shocking nature of the macabre, suggesting the unsettling connection between the beauty of life and the inevitability of death. In the context of the arts, particularly during and after the Black Death era, this term encapsulates the cultural trauma experienced by society, which was often expressed through realistic and sometimes grotesque portrayals of death, such as dancing skeletons and deathbed scenes.