Definition of "esoteric" in English

adjective

1. Intended for or likely to be understood by only a small number of people with a specialized knowledge or interest, or an enlightened inner circle.

   • The writing in this manual is very esoteric; I’d need a degree in engineering just to understand it!

2. Having to do with concepts that are highly theoretical and without obvious practical application; often with mystical or religious connotations.

3. Confidential; private.

   • an esoteric purpose
   • an esoteric meeting

noun

1. An esoteric doctrine or treatise; esoteric philosophy.

2. One who believes, or is an initiate, in esoteric doctrines or rites.