Meaning:
Intended for or likely to be understood by only a small number of people with a specialized knowledge or interest.

Explanation:
The term 'esoteric' refers to concepts, beliefs, or knowledge that are obscure or limited to a specific group. It often implies complexity or an insider’s view that is not easily accessible to the general public. This word is commonly used in contexts such as philosophy, religion, and specialized fields of study where only a niche audience engages with the material.

History:
The word 'esoteric' comes from the Greek word 'esoterikos', which means 'belonging to an inner circle'. It gained prominence in English during the 17th century to describe philosophical teachings that were intended for a select audience rather than the general public.