Oxford Dictionary English foothill noun noun BrE BrE//ˈfʊthɪl// ; NAmE NAmE//ˈfʊthɪl// [usually plural] Other geographic regions, Mountains and valleys Add to my wordlistjump to other results enlarge image a hill or low mountain at the base of a higher mountain or range of mountains the foothills of the Himalayas Wordfindermountainaltitude, foothill, mountain, peak, precipice, ridge, slope, summit, valley, volcano See related entries: Other geographic regions, Mountains and valleysSee foothill in the Oxford Advanced American DictionaryCheck pronunciation: foothill oxfordlearnersdictionaries.com