A shuttle, in general, is something which travels back and forth between places in a regular and relatively frequent manner.

• a loom component, for which see below (this is the original meaning).
• a spindle-shaped device holding the thread in tatting or knotting
• the Space Shuttle,
• a public transport system operating at frequent intervals on a short, usually loop route, such as a bus, train, or air shuttle, or a hybrid vehicle for hire service that combines features of a bus and a taxi. Also, the vehicle or route of the shuttle.
• a shuttlecock, the object batted back and forth in badminton

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A shuttle in weaving is a device used with a loom that is thrown back and forth between the threads of the warp in order to weave in the weft or woof. Shuttles are often made of flowering dogwood wood because it is so hard, resists splintering, and finishes very smooth.