hermetically sealed very tightly closed so that air cannot get in or out = airtight (hermeticus, from Hermes Trismegistus, a magician in ancient stories who invented a way of keeping air out of containers)
(DISAPPROVING) separated and protected from very different conditions outside, in an unnatural way: We drove past a row of squalid shacks on the way to our hotel, where we slept in air-conditioned, hermetically sealed rooms
A description of packages that provide an absolute seal against the infusion of water to prevent degradation of the electrical components within the package The test for Hermeticity is to observe lead rates when placed in a vacuum
If a container has a hermetic seal, the seal is very tight so that no air can get in or out. = airtight + hermetically her·meti·cal·ly The batteries are designed to be leak-proof and hermetically sealed
Refers to a device that is sealed by either metal to metal or glass to metal fusion to prevent moisture or contaminants from entering the switch cavity The degree of seal is numerically expressed in the form of a maximum allowable leak rate Example: 1 x 10 - 8th ATM cc/sec
Of or pertaining to the system which explains the causes of diseases and the operations of medicine on the principles of the hermetic philosophy, and which made much use, as a remedy, of an alkali and an acid; as, hermetic medicine
disapproval You use hermetic to describe something which you disapprove of because it seems to be totally separate from other people and things in society. Its film industry operates in its own curiously hermetic way Their work is more cosily hermetic than ever
Of or pertaining to the system which explains the causes of diseases and the operations of medicine on the principles of the hermetic philosophy, and which made much use, as a remedy, of an alkali and an acid; as, hermetic medicine