hermetically seal

present singular third person hermetically seals · participle present hermetically sealing · participle past hermetically sealed · past hermetically sealed

1. transitiveTo seal with an airtight seal.

   They hermetically sealed the kettles to accelerate the cooking.

   2 more examples

   Some manufacturers isolated the electronic circuitry and hermetically sealed it in a metal capsule.

   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. transitiveTo isolate from external influences or prevent escape from.

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