Thetan

//ˈθeɪ.tən// noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    A soul, spirit or being.

    "Actually a thetan is in a very, very small amount of mass. From some experiments conducted about fifteen or twenty years ago – a thetan weighed about 1.5 ounces!"

Example

More examples

"Actually a thetan is in a very, very small amount of mass. From some experiments conducted about fifteen or twenty years ago – a thetan weighed about 1.5 ounces!"

Etymology

Coined by Scientology founder L. Ron Hubbard, from theta + -n, from Ancient Greek θῆτα (thêta, “theta”), used in Scientology to represent the source of life.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.