noun
downhill; downward slope; descent
Refers to a physical slope or road that goes downward. Often contrasted with 上り坂 (uphill).
See also: 上り坂
この道は下り坂が続いている。
This road continues downhill.
Be careful on downhill slopes because it's easy to pick up speed.
noun
decline; waning; ebb; going downhill
Metaphorical use for a worsening trend, such as in business, health, or ability. Often used with ～になる or ～をたどる.
景気は下り坂にある。
The economy is on the decline.
彼の体力も下り坂だ。
His physical strength is also waning.