To reroute means to send something or someone along a different path than originally planned. When construction blocks your usual way to school, your bus driver might reroute through different streets to get you there safely. When a flight can't land at its destination airport because of bad weather, air traffic controllers reroute the plane to a nearby city.

Delivery drivers constantly reroute when they encounter traffic jams or road closures. A computer network can reroute data through different servers if one connection fails, ensuring your video call doesn't drop.

You can also use the word more broadly for changing plans or redirecting efforts. A teacher might reroute a class discussion when it goes off track, or you might reroute your afternoon plans when a friend suddenly becomes available to hang out. Rerouting shows flexibility: instead of giving up when the original path doesn't work, you find another way to reach your goal.