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Definition of exfiltrate

exfiltrate

/ˈɛks.fɪl.treɪt/
ex · fil · trate
Past Simple:exfiltrated
•
Past Participle:exfiltrated
•
Present Participle:exfiltrating
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exfiltrate Lexical Profile

exfiltrate Game Scores & Validity

• verb

1

To transfer or copy data from a computer or network without authorization (in cybersecurity).

Example

"The security audit revealed that the malware was designed to exfiltrate sensitive customer records to an external server."

2

To withdraw or extract stealthily or surreptitiously from a hostile or dangerous area.

Example

"The rescue team managed to exfiltrate the stranded researchers before the storm cut off the mountain pass."

3

To pass, seep, or filter out of a structure, system, or porous medium (of air or liquid).

Example

"Poorly sealed window frames allow warm indoor air to exfiltrate during the winter months."

Synonyms
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Antonyms
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• Nearby Words

exergaming
exert
exertion
exfiltrate
exfoliant
exfoliate
exfoliation

Word Origin & Etymology

Coined in the mid-20th century from the prefix 'ex-' (meaning 'out of') and 'filtrate', modeled directly as the opposite of 'infiltrate'.

Cite this Entry

Wordmom. (2026). Definition of Exfiltrate. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/exfiltrate
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