Part of speech: adjective
Understood by or meant for only a select few with special knowledge
Belonging to a select few
Examples of Esoteric in a sentence
"I'd hoped the seminar would attract more viewers, but the information was too esoteric for wide appeal."
"Don't fill your presentation with esoteric details—stick to the big picture."
Esoteric was originally applied to information kept within a certain inner circle, somewhat secretively. While esoteric information may be hard for the general public to understand, it's no longer considered secret or restricted to a certain subset.
Did you Know?
The word esoteric originally referred to the secret teachings of Greek philosophers, as opposed to the exoteric, or public ones.