[ 'sɒlɪpsɪz(ə)m ]
■ noun
1》 the view or theory that the self is all that can be known to exist.
2》 self-centredness or selfishness.
Derivatives
solipsist noun
solipsistic adjective
solipsistically adverb
Origin
C19: from L. solus 'alone' + ipse 'self' + -ism .