What is lane freezing?

I've heard the term thrown about quite a bit. Is it just not hitting creeps except to last hit, and even then, waiting for the last possible moment before they die? eg. Farming w/o pushing. There were similar terms in HoN but in that game (+ DotA) it made more sense because you could actually deny creeps and pull the lane back toward your tower if you so desired. In LoL, I don't really get how this is a particular strategy since in many situations, you're only attacking creeps to last hit.