overnight shipping meaning refers to a shipping service that guarantees delivery of a package by the next business day. Overnight shipping is ideal for time-sensitive shipments, ensuring that goods or documents reach their destination quickly. Many major carriers, such as USPS, FedEx, and UPS, offer overnight shipping services with varying levels of speed and pricing. The cost for overnight shipping can be higher compared to standard delivery services, but it provides the convenience of fast delivery for urgent orders.