Solipsism is the philosophical theory that what's in your mind is the only reality that can be known and verified.

Solipsism comes from the Latin words for alone (sol) and self (ipse), and means that only the self is real. In metaphysical solipsism, your mind is the only thing that's real, and everything else is just a representation. In epistemological solipsism, there might be a world outside your mind, which you could detect with your senses, but it's impossible to prove. In methodological solipsism the self is the only proper starting point for exploring the nature of reality.

Definitions of solipsism
  1. noun
    (philosophy) the philosophical theory that the self is all that you know to exist
    see moresee less
    type of:
    philosophical doctrine, philosophical theory
    a doctrine accepted by adherents to a philosophy
Word Family

Test prep from the experts

Boost your test score with programs developed by’s experts.

  • Proven methods: Learn faster, remember longer with our scientific approach.
  • Personalized plan: We customize your experience to maximize your learning.
  • Strategic studying: Focus on the words that are most crucial for success.


  • Number of words: 500+
  • Duration: 8 weeks or less
  • Time: 1 hour / week


  • Number of words: 500+
  • Duration: 10 weeks or less
  • Time: 1 hour / week


  • Number of words: 700+
  • Duration: 10 weeks
  • Time: 1 hour / week