Soul

A soul was an ill-defined, sometimes religious term for the essence of a sentient being. For some, it was closely tied to the definition of life. According to the Eleventh Doctor, souls were made of stories, not atoms. (TV: The Rings of Akhaten) The soul was sometimes synonymous with a person's mind, their soul being composed of their memories, but even this was not considered accurate. However, the removal of a persons's mind to another plane could simulate death, leading to the allusion between a soul and a mind. (PROSE: Timewyrm: Revelation, Falls the Shadow)

In the 22nd century, some artists used soul extractors to improve their art, literally extracting portions of their souls and inserting them into the canvas. They used it sparingly, as the results of over-use were lethal. One time when an artist became addicted, he created a living being within the canvas. (PROSE: Untitled)

Death, or Duroc, attempted to collect thirteen souls in order to fully enter our reality. He was stopped by Owen Harper at twelve. (TV: Dead Man Walking)

The neutron eaters tricked Oliver Harrington into bringing more of them through from their dimension by making him think that angels were souls, returning from Heaven to the mortal world. (AUDIO: Lost Souls)

In 2013, Miss Kizlet scavenged the Wi-Fi to upload the souls of humans to feed to her client. (TV: The Bells of Saint John)

Astral projection was a method of travel in which the soul was separated from the body. (TV: Image of the Fendahl, Pyramids of Mars)

Human
The Soulless were a group that arose during the Miracle Day event, which had rendered virtually all humans on Earth incapable of dying. Members of the Soulless believed that because they could not die, they had been robbed of their souls. (TV: Dead of Night)

Gallifreyan
The Time Lords had a rite called Soul Catching, in which a dying Time Lord would transfer his soul to another Time Lord, which would then get assimilated into the Matrix. (PROSE: The Devil Goblins from Neptune)

Aplan
The Aplans believed that, after death, their souls ascended through six levels to their version of the afterlife. They dedicated Mortaria to this. (TV: The Time of Angels)