Solipsism is the theory that only the self is real and that the self cannot be aware of anything else except itself.(noun)
An example of solipsism is the idea that nothing matters except yourself.
See solipsism in Webster's New World College Dictionary
Origin: < L solus, alone, sole + ipse, self + -ism
See solipsism in American Heritage Dictionary 4
Origin: Latin sōlus, alone; see s(w)e- in Indo-European roots
Origin: + Latin ipse, self
Origin: + -ism.
Learn more about solipsism