LISTEN IN (ON SOMEONE OR SOMETHING)

listen in (on someone or something): translation

listen in (on someone or something)

1. to join someone or a group as a listener. •

The band is rehearsing. Let's go listen in on them.

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It won't hurt to listen in, will it?

2. to eavesdrop on someone. •

Please don't try to listen in on us. This is a private conversation.

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I am not listening in. I was here first. You are talking too loud.