Listening

To pay attention to a sound or speech.

"Please listen carefully as I explain.  I like to listen to music."

To expect or wait for a sound, such as a signal.

"You should listen for the starting gun."

To accept advice or obey instruction; to agree or assent.

"Listen, the only reason I yelled at you was because I was upset, OK?  Good children listen to their parents."

To hear (something or someone), to pay attention to.

Of something or someone that listens.

"Any listening person can tell she's lying."

Of something that is used in order to hear or to improve the ability to hear.

"He could hear better when he used his listening device."

Of an action that is performed with caution and attention to sounds.