Definitions
1.nounThe fastest of the disciplines of alpine skiing.
2.nounA rapid descent of a hill in related sports, especially in alpine skiing.
3.verbTo take part in downhill skiing.
4.adjectiveLocated down a slope or hill.
5.adjectiveGoing down a slope or a hill.
6.adjective(by extension) Easy.
7.adjective(by extension) Deteriorating, getting worse."After Don made those tasteless remarks, our relationship with him went downhill."
8.adverbDown a slope."Because we got to the summit of the mountain, we could only go downhill from there."