Definition of "exfiltration" in English

noun

1. (military) The process of exiting an area (usually behind enemy lines or in enemy territory).

2. (civil engineering) A method for managing storm water runoff.

3. (sciences) A filtering out (usually movement of a substance through a barrier).

4. (biology) A gradual movement of a substance to exterior (as through cell membrane to extracellular fluid or medium).

5. (computer security) The covert extraction of data from a system.