'Eavesdropper' definitions:

Definition of 'eavesdropper'

From: WordNet
noun
A secret listener to private conversations

Definition of 'Eavesdropper'

From: GCIDE
  • Eavesdropper \Eaves"drop`per\, n. One who stands under the eaves, or near the window or door of a house, to listen; hence, a secret listener. [1913 Webster]

Synonyms of 'eavesdropper'

From: Moby Thesaurus