Definition:
In Scientology, an Operating Thetan, or OT, is one whose soul, or thetan, is “at cause over matter, energy, space, time, form and life.” OTs are not dependent upon reality and so can function without a physical body. This is the state one strives for after becoming Clear. The seven training levels preparing the clear for OT status are labeled OT I-VII, but such people are actually pre-OT. Only upon attaining level OT VIII is one considered a full operating thetan.
Also Known As: OT

