Epistemology is the study of knowledge: what we know, how we know it, how we know we know it, and how to keep track of it without driving ourselves crazy.

You might be wondering if epistemology is just a hobby for people who know too much for their own good, but epistemology has a lot of uses. The study of knowledge leads to the study of learning, which leads to better methods of teaching. The study of knowledge helps us understand our cultural differences, which helps us all get along. Probably the coolest use of epistemology, though, is artificial intelligence: teaching computers how to learn.

Definitions of epistemology
  1. noun
    the philosophical theory of knowledge
    see moresee less
    methodological analysis, methodology
    the branch of philosophy that analyzes the principles and procedures of inquiry in a particular discipline
    type of:
    the rational investigation of questions about existence and knowledge and ethics
Word Family

Test prep from the experts

Boost your test score with programs developed by Vocabulary.com’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