1. generally, experiences (e.g., perceptions, memories, thoughts, volitions) of which one is unaware but that exist in the fringe of consciousness. See divided consciousness; unity of consciousness.

2. in cases of dissociative identity disorder, a person’s sense of having access to coexisting, distinct personalities. —coconscious adj. [described by U.S. physician Morton Prince (1854–1929), who preferred coconscious to the term subconscious]