What does it mean when an economist says that a currency has become stronger?

When an economist says that a currency has become stronger, it means that the currency has increased in value relative to other currencies. This often leads to a higher exchange rate, making imports cheaper and exports more expensive for foreign buyers. A stronger currency can indicate a robust economy but may also negatively impact exporters by making their goods less competitive abroad. Overall, it reflects changes in supply and demand for the currency in global markets.