transformer

noun

1. 1.(toys) A toy in the Transformers toyline which has mechanical parts that allow it to be altered in appearance from its original form as a humanoid robot action figure to another form, usually a vehicle, depending on the toy.
2. 2.One of the characters in the Transformers franchise who is an alien humanoid robot that can mechanically alter its appearance, or "transform", into a vehicle, creature, or (rarely) a tool.
3. 3.Something that transforms, changing its own or another thing's shape.
4. 4.A static device that transfers electric energy from one circuit to another by magnetic coupling. Their main use is to transfer energy between different voltage levels, which allows choosing most appropriate voltage for power generation, transmission and distribution separately.