Definitions

1. adverb

in a downward direction or slope, especially in relation to a mountain

“The skier sped downhill at incredible speed.”

2. noun

a slope or incline leading downward, especially from a mountain

“The downhill track was famous for its steep drop-offs.”

3. noun

a sport or event that involves racing or competition on a downhill slope, especially skiing or mountain biking

“The downhill skiing competition was held on a challenging slope.”