hermetically seal

Verb

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.
2. (transitive) To isolate from external influences or prevent escape from.
   • We were hermetically sealing ourselves within the seemingly safe cocoon of groupthink.