My definition (which most conservatives no longer dispute)
GW: A warming trend that seems to be larger and faster, compared to warming trends after other iceages as seen in the ice core and the geological records.
I know better than to try and dispute whether it is man caused or not. Even so, the words "global warming" do not say anything about what causes the warming, so I don't know why you would jump to that conclusion.
Personally I believe that there are very good reasons to think that human activity is a major cause of the warming. But I don't have patience for a debate on that topic, today.
