ex·​fil·​trate eks-ˈfil-ˌtrāt How to pronounce exfiltrate (audio)
exfiltrated; exfiltrating

transitive verb

: to remove (someone) furtively from a hostile area
Kublinski avoided detection. He was exfiltrated from Poland, with his family, only after being compromised by a leak from the U.S. government.Radek Sikorski
: to steal (sensitive data) from a computer (as with a flash drive)

intransitive verb

: to escape from a hostile area
exfiltration noun

Examples of exfiltrate in a Sentence

Recent Examples on the Web The files, which were from April 2019 through 2020, were exfiltrated from Rightway’s IT environment. Dan Goodin, Ars Technica, 2 Nov. 2023 This January, on a trip to Gonaïves in northern Haiti, Henry had to be exfiltrated from a shootout between his security guards and gunmen. Monique Clesca, Foreign Affairs, 1 Feb. 2022 In December 2022, the profile data and email addresses of 200 million Twitter users were exfiltrated by hackers. Shay Levi, Forbes, 9 Mar. 2023 After all, a bridge controller performs the encryption and decryption using that secret key, and so could either secretly exfiltrate and store it or furtively encrypt the data with its own, different key. WIRED, 15 June 2023 Ransomware extortion payments are a good example, where hackers encrypt and exfiltrate data to ensure victimized companies pay the ransom. Yuen Pin Yeap, Forbes, 18 Apr. 2023 As long as the data is not exfiltrated and doesn’t leave the city’s system, the city could possibly avoid a lawsuit, Yarbrough said. Everton Bailey Jr., Dallas News, 25 May 2023 From there, the agency quietly exfiltrated Mr. Smolenkov, his wife and three young children to a safe house in the U.S. James Bamford, wsj.com, 14 Apr. 2023 Enlarge BeeBright / Getty Images / iStockphoto Researchers have discovered a clever piece of malware that stealthily exfiltrates data and executes malicious code from Windows systems by abusing a feature in Microsoft Internet Information Services (IIS). Dan Goodin, Ars Technica, 16 Feb. 2023 See More

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'exfiltrate.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History


back-formation from exfiltration, from ex- entry 1 + (in)filtration

First Known Use

1947, in the meaning defined at transitive sense 1

Time Traveler
The first known use of exfiltrate was in 1947

Dictionary Entries Near exfiltrate

Cite this Entry

“Exfiltrate.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/exfiltrate. Accessed 29 Nov. 2023.

Last Updated: - Updated example sentences
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