Eavesdropper

//ˈiːvzˌdɹɒpə(ɹ)// noun, slang

Definitions

Noun
  1. 1
    One who eavesdrops.
  2. 2
    a secret listener to private conversations wordnet
  3. 3
    A surveillance aircraft. slang

    "[…] 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."

Etymology

From eavesdrop + -er (“person or thing which does”).

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