Wiktionary
n. an airtight seal
Wikipedia
A hermetic seal is the quality of something—a container, structure, etc.—being airtight (excluding passage of air, oxygen, or other gases). Used technically, it is stated in conjunction with a specific test method and conditions of use.
Usage examples of "hermetic seal".
With that door having to be forced open, the hermetic seal is broken.
DOORSEAL: a portable plastic hermetic seal used for moisture security in Fremen overday cave camps.
This is the way Rosa had changed Antonio: In severing mokoi-his lifeline to Heitor-she had shattered the hermetic seal within which the twins had existed.
In severing mokoi-his lifeline to Heitor-she had shattered the hermetic seal within which the twins had existed.
The bags were then tightly closed with zippers and hermetic seal locks.
That the Womb still was capable of hermetic seal was the only defeat.
She couldn't possibly have heard him through the closed hermetic seal.