Traction is the grip or friction between two surfaces that prevents sliding. When your shoes have good traction on a basketball court, they grip the floor so you can stop and change direction quickly without slipping. Car tires need traction on the road to accelerate, brake, and turn safely. In icy or muddy conditions, vehicles lose traction and start to slip or spin their wheels.

Traction is what lets you pull yourself forward instead of just spinning in place. Without traction, you can't get moving effectively. Think about trying to run on a patch of ice versus running on dry pavement. The pavement gives you traction; the ice doesn't.

People also use traction to describe an idea or project that's starting to gain momentum and support. When a new game or app gains traction, more and more people start using it. A fundraiser might struggle at first, then suddenly gain traction as word spreads. In this sense, traction means you're no longer spinning your wheels. You're actually moving forward with real progress, like a car tire that finally grips the road and launches you ahead.