The process of secretly removing or smuggling out people, documents, or information from a location, organization, or country.
From 'exfiltrate' + the suffix '-ation' indicating a process. A 20th-century term created by analogy with 'infiltration' in military and intelligence contexts.
During the Cold War, exfiltration became a crucial concept in spy fiction and real espionage—it's the dramatic finale of every intelligence thriller where agents must get classified documents or defecting scientists out of enemy territory.
Complete word intelligence in one call. Free tier — 50 lookups/day.