「A death erection, angel lust, or terminal erection is a post-mortem erection, technically a priapism, observed in the corpses of men who have been executed, particularly by hanging. The phenomenon has been attributed to pressure on the cerebellum created by the noose. Spinal cord injuries are known to be associated with priapism. Injuries to the cerebellum or spinal cord are often associated with priapism in living patients. Death by hanging, whether an execution or a suicide, has been observed to affect the genitals of both men and women. In women, the labia and clitoris will become engorged and there may be a discharge of blood from the vagina. In men, 'a more or less complete state of erection of the penis, with discharge of urine, mucus or prostatic fluid is a frequent occurrence…present in one case in three.' Other causes of death may also result in these effects, including fatal gunshot wounds to the brain, damage to major blood vessels, and violent death by poisoning. A postmortem priapism is an indicator that death was likely swift and violent.」
　　[　https://en.wikipedia.org/wiki/Death_erection 2013-09-26　]　
　「Singular accounts of necrophilia in history are sporadic, though written records suggest the practice was present within Ancient Egypt. Herodotus writes in The Histories that, to discourage intercourse with a corpse, ancient Egyptians left deceased beautiful women to decay for 'three or four days' before giving them to the embalmers. Herodotus also alluded to suggestions that Greek tyrant Periander had defiled the corpse of his wife, employing a metaphor: 'Periander baked his bread in a cold oven.' …Hittite law the 16th century BC through to the 13th century BC explicitly permitted sex with the dead.」
　　[　https://en.wikipedia.org/wiki/Necrophilia 2015-11-21, emphasis ours　]　
　Before decrying, note that cannibalism, torture until death, and necrophilia were portrayed in the original Snow White and the Seven Dwarfs.
　And apparently, necro-feelie-ya is still alive and well in the 21st century:
　「A Los Angeles police officer has been charged with a felony after footage captured by a body camera allegedly showed him fondling a deceased woman's breasts.」
　　[　https://www.cbsnews.com/news/los-angeles-cop-david-rojas-arrested-for-allegedly-fondling-dead-womans-breasts/ 2019-12-13　]　 (albeit a mild case, in comparison to Snow White and the Seven Dwarves, to be sure) by the Brothers Grimm in their children's tale.
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External source definitions
none located, and you ought to ask yourself, why not?
definition speculated from combining the elements, or, from usage in other glyphs