sol·ip·sism (sŏl′ĭp-sĭz′əm, sō′lĭp-)n.
1. Philosophy The theory that the self is the only thing that can be known and verified.
2. The view that the self is the only reality.
[Latin sōlus, alone; see s(w)e- in Indo-European roots + Latin ipse, self + -ism.]
sol′ip·sist n.
sol′ip·sis′tic adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.