n. The metaphysical doctrine that the real is of the nature of thought; the doctrine that all reality is in its nature psychical.n. Pursuit of the ideal; the act or practice of idealizing; especially, imaginative treatment of subjects; a striving after ideal beauty, truth, justice, etc.n. In art, the effort to realize the highest type of any natural object by eliminating all its imperfect elements and combining the perfect into a whole which represents Nature, not as she is exhibited in any one example, but as she might be.