- Designed for, and understood by, the specially initiated
alone; not communicated, or not intelligible, to the general body of
followers; private; interior; acroamatic; -- said of the private and
more recondite instructions and doctrines of philosophers. Opposed to
exoteric.
Meaning of 'esoteric' (Princeton's WordNet)
1 . esoteric
[ a]
Meaning (1): - confined to and understandable by only an enlightened inner circle