To rewire means to install new electrical wiring in a building or device, replacing old or damaged wires. Electricians rewire houses when the old wiring becomes unsafe or when a building needs more electrical capacity for modern appliances. The process involves running new copper wires through walls, connecting them properly, and making sure electricity can flow safely to outlets and lights.

The word also means to change how something works by altering its internal connections. Scientists discovered that our brains can actually rewire themselves, creating new neural pathways when we learn new skills or break old habits. When you practice piano every day, your brain gradually rewires itself to make playing feel more natural. This process is called neuroplasticity, and it explains why practice makes perfect: you're literally rewiring your brain to get better at something.

People sometimes say they need to rewire their thinking when they want to change a habit or perspective. A student who always feels anxious about tests might work to rewire that response by practicing relaxation techniques and building confidence through preparation. The metaphor captures how change can require building new patterns to replace old ones.