Noun
thetan (plural thetans)
(Scientology) A soul, spirit or being.
After a loud set of snaps, the thetan was overwhelmed by darkness. Source: Internet
Bromley, p. 91 Scientology aimed to "rehabilitate" each person's thetan to restore its original capacities and become once again an " Operating Thetan ". Source: Internet
Many who remain at lower levels in the church are unaware of much of the Xenu story which is first revealed on Operating Thetan level three, or "OT III". Source: Internet