Economic Definition of peak. Defined.
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Term peak Definition: The transition of a business cycle from an expansion and a contraction. The end of an expansions carries the descriptive term peak. At the peak, the economy has reached the highest level of production in recent times. The bad thing about a peak, however, is that it is a turning point, a turning point to a contraction. So even though a peak is the "highest" is not necessarily something we want. We would prefer never to reach the peak.