Definition of "hermetic" []

• Completely sealed, especially against the escape or entry of air. (adjective)
• Impervious to outside interference or influence: the hermetic confines of an isolated life. (adjective)
• Mythology Of or relating to Hermes Trismegistus or the works ascribed to him. (adjective)
• Having to do with the occult sciences, especially alchemy; magical. (adjective)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "It is progressive to not only increase knowledge of the world, but to spread this knowledge as widely as possible; to wrap one's arguments in hermetic language is itself reactionary, supporting the position that there is a select "elite" who can understand these issues and cutting pretty much everyone else off from them."
• "We pollute, litter and desecrate our own country because we live in hermetic air-conditioned vinyl castles."
• "He knows how to work with a composer he described as "hermetic, private and living in the extreme remoteness of the Orkney Islands, where you can't easily get hold of him, so it all has to happen rather at arm's length.""