listening device
nounUK /ˈlɪs.ən.ɪŋ dɪˌvaɪs/
US /ˈlɪs.ən.ɪŋ dɪˌvaɪs/
A listening device is a small tool that helps you hear sounds better or secretly hear what people say.
The detective hid a listening device in the room to hear the conversation.
RELATED WORDS
OTHER MEANINGS
2. A small microphone used to secretly record what people say.
The spy planted a listening device under the table.
3. A device that helps a person with hearing problems hear sounds more clearly.
Grandpa uses a listening device so he can hear us at dinner.
4. Equipment used to monitor sounds in a room or building.
The security team set up a listening device near the entrance.