What does hermetically mean?
Hermetically is an adverb meaning in a way that makes something airtight, so that air, gases, liquids, or other material cannot pass through the boundary. Its best-known use is technical: engineers may say that a chamber, pipe joint, package, or electronic component is “hermetically sealed” when the closure prevents both leakage and the entry of contaminants. In figurative writing, “hermetically isolated” can suggest that a place, group, or system is completely cut off from outside contact. The word is more specific than simply “closed” or “tightly sealed,” because it invokes a barrier intended to be impermeable. It belongs chiefly to engineering, science, manufacturing, and technical or formal prose, though its vivid figurative form is also useful in journalism and cultural commentary. Learning it helps distinguish an ordinary closure from one designed to prevent all exchange across a boundary.
adverbIn a manner that completely seals something against the passage of air, gases, liquids, or other material; figuratively, in a way that isolates something completely from outside contact.
- So as to be completely airtight, preventing air or other material from passing through a sealed boundary.
- Figuratively, so as to be completely isolated from outside contact, influence, or information.
"The testing chamber was hermetically sealed to prevent any contamination."
"The specimen was hermetically sealed in a stainless-steel container before transport."
"The research institute remained hermetically isolated from political pressure and outside scrutiny."
From Hermes Trismegistus and alchemical vessels to modern vacuum chambers, hermetically connects centuries of sealing technology.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of hermetically
The English adjective hermetic was borrowed through Latin hermeticus from Greek Hermētēs, an epithet meaning “of Hermes.” Its early use was associated with the Hermetic writings attributed to Hermes Trismegistus and with alchemical sealing practices; the adverb hermetically was later formed from hermetic plus the suffix -ly. The modern engineering sense developed from the older idea of a vessel or space sealed so completely that no material could enter or escape.
Related word forms
How hermetically is actually used
Chiefly used in technical, scientific, and engineering contexts, especially with words such as “sealed” and “closed.” Its figurative use is comparatively uncommon but established, and it usually conveys a more complete or deliberate separation than ordinary words such as “closed.”
Easily confused with hermetically
Hermetically is an adverb describing how something is sealed or isolated, while hermetic is the corresponding adjective.