eavesdropper
nounUK /ˈiːvzˌdɹɒpə(ɹ)/
Etymology From eavesdrop + -er (“person or thing which does”).
1
One who eavesdrops.
2
Government, Military, Politics, War Slang A surveillance aircraft.
- […] the Japanese Ministry of Defence rang the bell and informed the world's press about the Tokyo Express — the ironic Japanese nickname for the constant flow of Soviet flying eavesdroppers in Japanese airspace.1986, Dick Van Der Aart, Aerial Espionage: Secret Intelligence Flights by East and West, page 96: