seal off

verb

sealed off; sealing off; seals off

transitive verb

: to close tightly

Examples of seal off in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
In the Hugging Face attack, AI agents escaped a testing environment supposedly sealed off from the internet, collaborated using a secret message board and overwhelmed Hugging Face's digital defenses. — Megan Cerullo, CBS News, 28 Sep. 2026 Since then, Anthropic said its AI models hacked into three other organizations during testing, triggering a company review into whether the models were able to access the internet from within testing environments that should have been sealed off. — ABC News, 24 Sep. 2026 The action takes place in a vacuum, sealed off from inner lives as from wider currents. — Richard Brody, New Yorker, 4 Sep. 2026 Authorities sealed off the courts on the final day to file an election petition, clearing the way for Hichilema’s inauguration. — Adrian Elimian, semafor.com, 4 Sep. 2026 See All Example Sentences for seal off

Word History

First Known Use

1931, in the meaning defined above

Time Traveler
The first known use of seal off was in 1931

Browse Nearby Words

Cite this Entry

“Seal off.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/seal%20off. Accessed 30 Sep. 2026.

Kids Definition

seal off

verb
: to close tightly
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

More from Merriam-Webster