hermetically seal
verbEtymology See hermetic
1
To seal with an airtight seal.
- They hermetically sealed the kettles to accelerate the cooking.
- Some manufacturers isolated the electronic circuitry and hermetically sealed it in a metal capsule.
1 more example
- The glass stoppers were inserted; the bottles hermetically sealed; and, depositing them in a secret drawer of a small casket, she locked it, put the little key on a chain that she always wore of her uncle's hair; and, pressing it to her heart, exclaimed, "Now I am mistress of my fate in this world!"1837, L[etitia] E[lizabeth] L[andon], Ethel Churchill: Or, The Two Brides. […], volume II, London: Henry Colburn, […], →OCLC, pages 328–329:
2
To isolate from external influences or prevent escape from.
- We were hermetically sealing ourselves within the seemingly safe cocoon of groupthink.