shuttle

Short definition from Wiktionary

Noun

1. 1
   A tool used to carry the woof back and forth between the warp threads on a loom.
2. 2
   The sliding thread holder in a sewing machine, which carries the lower thread through a loop of the upper thread, to make a lock stitch.
3. 3
   A transport service (such as a bus or train) that goes back and forth between two or more places.
4. 4
   Such a transport vehicle; a shuttle bus; a space shuttle.
5. 5
   Any other item that moves repeatedly back and forth between two positions, possibly transporting something else with it between those points (such as, in chemistry, a molecular shuttle).
6. 6
   A shuttlecock.
7. 7
   A shutter, as for a channel for molten metal.

Verb

1. 1
   To go or send back and forth between two places.
2. 2
   To transport by shuttle or by means of a shuttle service.