Espionage
WordNet
noun
(1) The systematic use of spies to get military or political secrets
WiktionaryText
Etymology
Recorded since 1793, from , from , from , itself probably from a source (akin to spehon "spy"), possibly via (from ). More at spy
Noun
- The act or process of learning secret information through clandestine means.
- Undercover work
- Spying as reconnaissance