listen in
US /ˈlɪs.ən ɪn/
UK /ˈlɪs.ən ɪn/
1.
escuchar a escondidas, espiar
to listen to a private conversation between other people, without them knowing that you are listening
:
•
I caught my sister trying to listen in on my phone call.
Sorprendí a mi hermana intentando escuchar a escondidas mi llamada telefónica.
•
The neighbors often listen in on our conversations.
Los vecinos a menudo escuchan a escondidas nuestras conversaciones.