1.
to listen to a conversation that you are not supposed to hear :
You shouldn't listen in on other people's conversations.
2.
to listen to a radio broadcast
1.
to listen to a conversation that you are not supposed to hear :
You shouldn't listen in on other people's conversations.
2.
to listen to a radio broadcast
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005