To load something again, especially a weapon or a device. After firing the last bullet, the soldier quickly reloaded his rifle.
To refresh or update the contents of a webpage or application. If the page doesn't display correctly, try reloading it in your browser.
To add or provide a new supply of money, ammunition, or other resources to something such as a prepaid card, account, or container. I need to reload my prepaid card before we take the subway.