1. a person who listens secretly to a private conversation without the knowledge or permission of the speakers

Examples

• The eavesdropper hid behind the door to hear what they were discussing.
• She felt violated when she discovered an eavesdropper had been listening to her phone call.
• The security team caught an eavesdropper trying to record conversations in the conference room.
• He was accused of being an eavesdropper after someone saw him listening at the window.
• The novel's protagonist is a professional eavesdropper hired to gather intelligence.
• Eavesdroppers often use hidden microphones or apps to monitor private conversations.