Interlining refers to a couple of concepts depending on the context in which it is used:
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Travel and Transportation: In the context of air travel, interlining refers to a system where multiple airlines cooperate to facilitate the seamless transfer of passengers and their luggage between different airline services. This means that if a traveler has connecting flights on different airlines, the luggage can be transferred directly without the traveler needing to retrieve and recheck it. Interlining arrangements help simplify the check-in process and provide a more streamlined travel experience.
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Textiles and Fashion: In the context of textiles, interlining is a layer of fabric placed between the outer fabric and the lining of a garment or other textile item. It is used to add structure, support, and insulation. Interlining can be made from a variety of materials, such as cotton, polyester, or other synthetic materials, and it is often used in garments like jackets, coats, and tailored clothes to achieve a desired shape or drape.
If you need information on a specific context, feel free to ask!