noun

• Something that transforms, changing its own or another thing's shape.
• (electrical engineering) 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.
• (machine learning) A neural network architecture that relies on self-attention mechanisms.
• (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.
• (fiction) In the Transformers franchise, any of the alien humanoid robots that can mechanically alter their appearance, or "transform", into a vehicle, creature, or (rarely) a tool.
• Alternative letter-case form of Transformer [(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.]