hermetically seal

See hermetic

hermetically seal (third-person singular simple present hermetically seals, present participle hermetically sealing, simple past and past participle hermetically sealed)

1. (transitive) 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.

   • 1837, L[etitia] E[lizabeth] L[andon], Ethel Churchill: Or, The Two Brides. […], volume II, London: Henry Colburn, […], →OCLC, pages 328–329:

     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!"

2. (transitive) To isolate from external influences or prevent escape from.

   We were hermetically sealing ourselves within the seemingly safe cocoon of groupthink.

• “hermetically seal”, in OneLook Dictionary Search.