1. 1. Immediate consciousness of the transcendent or ultimate reality or God.
   2. The experience of such communion as described by mystics.
2. A belief in the existence of realities beyond perceptual or intellectual apprehension that are central to being and directly accessible by subjective experience.
3. Vague, groundless speculation.

The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.