Explanation of the term required.

Hi everyone

I have read this term in Wireless communication , please anyone explain this
"Eavesdropping"

Hali,
http://en.wikipedia.org/wiki/Eavesdropping
Eavesdropping is the act of secretly listening to the private conversation of others without their consent, as defined by Black's Law Dictionary.[1] This is commonly thought to be unethical and there is an old adage that eavesdroppers seldom hear anything good of themselves.[2]
Eavesdropping can also be done over telephone lines (wiretapping), email, instant messaging, and other methods of communication considered private (If a message is publicly broadcast, witnessing it does not count as eavesdropping.). VoIP communications software is also vulnerable to electronic eavesdropping by via malware infections such as Trojan.Peskyspy.

K.