Phonetic: /es·​o·​ter·​ic/

Part of Speech: Adjective

Definition

• designed for or understood by the specially initiated alone
  a body of esoteric legal doctrine …
  —Benjamin N. Cardozo
  
  
• : requiring or exhibiting knowledge that is restricted to a small group
  esoteric terminology
  
  The titles of some concert tours can be a bit esoteric.
  —Matt Wake
  
  Some of the film’s winking references are more esoteric than others, and a lot of wordplay and in-jokes are potentially lost on a non-Japanese audience: some of them are … basically untranslatable.
  —Kambole Campbell
  
  
• broadly : difficult to understand
  esoteric subjects