Hold luggage (also commonly known as "checked baggage") is defined in 2026 as any item of luggage that is handed over to the airline at the check-in counter or a self-service bag drop to be stored in the aircraft's cargo hold during the flight. Unlike carry-on luggage, which stays with the passenger in the cabin, hold luggage is not accessible once it has been checked in. This category typically includes larger suitcases, heavy duffel bags, and specialized equipment such as sets of golf clubs, skis, or strollers. Airlines impose strict weight and size limits on hold luggage—usually 23 kg (50 lbs) for economy class—and items exceeding these limits often incur significant "oversize" or "overweight" fees. Hold luggage is the required place for items prohibited in the cabin, such as liquids over 100ml, sharp tools, and most sporting goods. Each piece is tagged with a unique barcode (LPN) that allows the airline's automated sorting systems to track it from the origin to the destination's baggage carousel, where the passenger retrieves it after landing.