abbreviation of Operating Thetan: a state of beingness. It is a being "at cause over matter, energy, space, time, form and life." Operating comes from "able to operate without dependency on things," and Thetan is the Greek letter theta (0?-), which the Greeks used to represent thought or perhaps spirit, to which an n is added to make a noun in the modern style used to create words in engineering. It is also 0?-n or "theta to the nth degree," meaning unlimited or vast. —OEC - Awareness Levels App Mar 91