Definition of: es·o·ter·ic.

.[ˌesəˈterik]

ADJECTIVE
intended for or likely to be understood by only a small number of people with a specialized knowledge or interest:

“esoteric philosophical debates”

synonyms: abstruse · obscure · arcane · recherché · rarefied · recondite · abstract · enigmatic · inscrutable · cryptic · Delphic · complex · complicated ·