shifter

1. One who, or that which, shifts or changes.

2. A word whose meaning changes depending on the situation, as by deixis.

3. (dated)Someone who plays tricks; a trickster.

4. An assistant to the ship's cook in washing, soaking, and shifting the salt provisions.

5. A control device (usually a lever or button) for shifting gears in a gearbox, or an arrangement for shifting a belt sidewise from one pulley to another.

6. A wire for changing a loop from one needle to another, as in narrowing, etc.

7. A component used by the rider to control the gearing mechanisms and select the desired gear ratio, usually connected to the derailleur by a mechanical actuation cable.

8. (Australia, especially)A spanner with an adjustable jaw size.

9. (historical)A person employed to repair the horseways and other passages, and keep them unobstructed.

10. (Pennsylvania, US)A switcher or shunter: a railroad locomotive used for shunting.

11. A shape-shifter; a person or other being capable of changing their physical form, especially a lycanthrope.

12. A shiftworker.

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