Normally, the economy goes through cycles. This is usual, and therefore could be considered normal. The last fifteen years of uninterrupted growth was led to believe some of that business cycles had been completed, but has been shown that this growth was partly speculative and artificial, so we expected the fall can be great. When the economy grows, it is normal for prices to rise, ie there is some inflation, the pressure of demand. Thus the main objective of the monetary policy of the European Central Bank is price stability (set the objective of keeping inflation below 2% over the medium term).
When the economic crisis began (in general a negative economic situation is prolonged in time), the Spanish president, Jose Luis Rodriguez Zapatero, speaking of a slowdown. What nuance wanted to do? In referring to the slowdown that the economy continued to grow, but much lower rates than they had been doing (moved from growth exceeding 3% year to be around 0.5%). To some economists, the brakes could be considered as sharp recession. Technically, recession is usually considered when a fall of GDP of a country for two consecutive quarters. When you're in a recession is often caused a decrease in consumption, which falls in aggregate demand and thus investment by companies in this situation, there is also an increase in unemployment. As a result of falling consumption and rising unemployment, there is a price suppression. When in this situation, in which prices rise, but much less strongly, by weak demand, some talk of disinflation.