What is Listen in?
Listen in definition and meaning on Dictionary terms:
verb (used without object)
to give attention with the ear; attend closely for the purpose of hearing; give ear.
to pay attention; heed; obey (often followed by to): Children don’t always listen to their parents.
to wait attentively for a sound (usually followed by for): to listen for sounds of their return.
Informal. to convey a particular impression to the hearer; sound: The new recording doesn’t listen as well as the old one.
verb (used with object)
Archaic. to give ear to; hear.
listen in, to listen to a radio or television broadcast: Listen in tomorrow for the names of the lottery winners.to overhear a conversation or communication, especially by telephone; eavesdrop: Someone was listening in to his private calls.