<p><strong>Adverb</strong></p><ul><li>down the slope of a hill; downward.</li><li>into a worse or inferior condition: The business has been going downhill.</li></ul><p><strong>Adjective</strong></p><ul><li>going or tending downward on or as on a hill.</li><li>free of problems or obstacles; easy: After the initial setbacks on the project, it was downhill all the way.</li><li>of or relating to skiing downhill.</li></ul><p><strong>Noun</strong></p><ul><li>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.</li></ul>