A runner is a person who runs, especially for sport or pleasure.

The runners in a horse race are the horses taking part.

A drug runner or gun runner is someone who illegally takes drugs or guns into a country.

Someone who is a runner for a particular person or company is employed to take messages, collect money, or do other small tasks for them.

Runners are thin strips of wood or metal underneath something which help it to move smoothly.

On a plant, runners are long shoots that grow from the main stem and put down roots to form a new plant.

A runner is a long narrow mat that is put on a piece of furniture or on the floor.

If someone does a runner, they leave a place in a hurry, for example in order to escape arrest or to avoid paying for something.