Definition - What does Wardriving mean?
Wardriving refers to the act of locating open Wi-Fi hot spots while driving in a car. The goal of wardriving is to document and map hotspots, and generally involves software specifically designed for wardriving.
Techopedia explains Wardriving
Many confuse wardriving with leeching or piggybacking. The difference is that somebody who leeches a connection is attempting to use an unsecure connection without permission. In many parts of the world, unauthorized use of a network in this fashion is illegal. Wardriving is different -- the goal is to collect information about open wireless connection, often to develop a map of connectivity in a certain area.