downhill

UK: /ˌdaʊnˈhɪl/

US: /adv. ˈdaʊnˈhɪl; adj., n. -ˌhɪl/

US: (adv., adj. doun′hil′; n. doun′hil′)

WordReference Random House Learner's Dictionary of American English © 2025

down•hill /adv. ˈdaʊnˈhɪl; adj., n. -ˌhɪl/   adv. 

1. down the slope of a hill;
   downward:
   She skied downhill quickly.
2. into a worse condition:
   Things have gone downhill again.

adj. 

3. going downward on or as if on a hill:
   a downhill trail.
4. easy;
   free of things that prevent one from finishing:
   [be + ~] We're halfway; things will be all downhill now.
5. Sport of or relating to skiing downhill:
   [before a noun] a downhill skier.

n. [countable]

6. Sport a timed ski race down a steep trail:
   He won the gold medal in the men's downhill.
   Compare slalom.

WordReference Random House Unabridged Dictionary of American English © 2025

down•hill  (adv., adj. doun′hil′;n. doun′hil′), adv. 

1. down the slope of a hill;
   downward.
2. into a worse or inferior condition:
   The business has been going downhill.

adj. 

3. going or tending downward on or as on a hill.
4. free of problems or obstacles;
   easy:
   After the initial setbacks on the project, it was downhill all the way.
5. Sport of or pertaining to skiing downhill.

n. 

6. Sport a timed ski race on a steep slope in which competitors take the most direct route to the finish line following a course with relatively few turns and attaining very high speeds. Cf. slalom. 

• down¹ + hill 1585–95

Collins Concise English Dictionary © HarperCollins Publishers::

downhill / ˈdaʊnˈhɪl/ adjective

1. going or sloping down

adverb

1. towards the bottom of a hill; downwards
2. go downhill ⇒ to decline; deteriorate

noun

1. the downward slope of a hill; descent
2. a competitive event in which skiers are timed in a downhill run