A double-dip recession refers to a situation where a country's Gross Domestic Product (GDP) growth rate turns negative again after a brief period of positive growth. It is characterized by a temporary recovery followed by a decline in economic activity, leading to another recession. This phenomenon can have significant implications for the overall health of an economy.

1. Initial recession:
The first phase of a double-dip recession begins with an initial recession, which is a period of negative GDP growth. This typically occurs due to factors such as a decrease in consumer spending, declining business investment, or a decrease in government spending. It may also be triggered by external factors like global economic downturns or financial crises.

2. Temporary recovery:
After the initial recession, there might be a brief period of positive GDP growth. This can be a result of various factors, such as government stimulus packages, increased consumer confidence, or a rebound in global demand. During this phase, there is a sense of optimism as economic indicators show signs of improvement.

3. Second recession:
However, in a double-dip recession, the positive growth is short-lived, and the economy slides back into a recessionary phase. This can happen due to several reasons, including a lack of sustained demand, high levels of debt, or structural weaknesses in the economy. The second recession typically leads to a contraction in economic output, rising unemployment, and decreased consumer and business confidence.

Implications of a double-dip recession:
- Increased unemployment: A double-dip recession can lead to higher unemployment rates as businesses struggle to maintain operations or downsize their workforce in response to reduced demand.
- Reduced consumer and business confidence: The uncertainty and economic instability associated with a double-dip recession can negatively affect consumer and business confidence, leading to decreased spending and investment.
- Financial market volatility: Double-dip recessions can create significant volatility in financial markets as investors react to changing economic conditions and adjust their investment strategies accordingly.
- Government response: Governments often implement fiscal and monetary policies to mitigate the effects of a double-dip recession. These can include measures such as lowering interest rates, increasing government spending, or implementing tax cuts to stimulate economic activity.

In conclusion, a double-dip recession occurs when an economy experiences a temporary recovery followed by a subsequent recession. This pattern of economic decline can have wide-ranging effects on employment, consumer and business confidence, financial markets, and government policies.