What's the difference between a recession and a depression?

Recession
The standard newspaper definition of a recession is a decline in the Gross Domestic Product (GDP) for two or more consecutive quarters.

Depression
Before the Great Depression of the 1930s any downturn in economic activity was referred to as a depression. The term recession was developed in this period to differentiate periods like the 1930s from smaller economic declines that occurred in 1910 and 1913. This leads to the simple definition of a depression as a recession that lasts longer and has a larger decline in business activity.

Difference between a recession and a depression?
So how can we tell the difference between a recession and a depression? A good rule of thumb for determining the difference between a recession and a depression is to look at the changes in GNP. A depression is any economic downturn where real GDP declines by more than 10 percent. A recession is an economic downturn that is less severe.