The term 'RUNNER IN FRONT' can be summarized as a PACER, which is a five-letter word. A PACER is someone who runs in front of a group of runners to set the pace and help them maintain a steady speed. Pacers are often used in long-distance running events, such as marathons, to help the participants stay on track and reach their goals. Pacers can also be used in shorter races, such as 5Ks, to help the runners stay motivated and push themselves to their limits.