Transformer (noun)

1. An electrical device that converts high-voltage, low-current electric power to low-voltage, high-current power or vice versa.
2. A device for converting alternating current (AC) to direct current (DC) or vice versa.
3. A toy or character in the Transformers franchise that can change form between a vehicle or machine and a robot.

Origin:

Late 19th century: from latin 'transformare' meaning 'to change shape or form'.

Examples:

1. The electrician installed a transformer to step down the voltage to a safe level.
2. The transformer in the power station failed, causing a blackout.
3. The transformer toy was a popular gift among children who loved action and adventure.
4. The transformer character was part of an intergalactic war between the Autobots and the Decepticons.
5. The transformer design allowed it to switch seamlessly between modes, providing greater versatility.