Definitions
1.AdjectiveIntended 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.AdjectiveHaving to do with concepts that are highly theoretical and without obvious practical application; often with mystical or religious connotations.
3.AdjectiveConfidential; private."an esoteric purpose; an esoteric meeting"
4.NounAn esoteric doctrine or treatise; esoteric philosophy.
5.NounOne who believes, or is an initiate, in esoteric doctrines or rites.