Coastal erosion refers to the process by which the shorelines of oceans, seas or lakes are worn away over time. This can occur due to natural forces such as waves and currents, or through human activities like construction along the coastline. The result is often loss of land, damage to infrastructure and ecosystems, and changes in the shape of the coastline. Coastal erosion is a significant concern for many communities around the world, and efforts are being made to mitigate its effects through conservation measures and sustainable development practices.