exfiltration

noun5

1. •
   The process of exiting an area (usually behind enemy lines or in enemy territory).
2. •
   The covert extraction of data from a system.
3. •
   A method for managing storm water runoff.
4. •
   A filtering out (usually movement of a substance through a barrier).
5. •
   A gradual movement of a substance to exterior (as through cell membrane to extracellular fluid or medium).