From Longman Dictionary of Contemporary Englishfoothillfoot‧hill /ˈfʊtˌhɪl/ noun [countable usually plural] DNone of the smaller hills below a group of high mountains the foothills of the Himalayas
Examples from the Corpus
foothill• Its massive cone rose five thousand feet above the Bahdu plain and a chain of foothills stretched south-west parallel with the Awash.• No trees or foothills this time; it was all cleared land, dry rice paddies, and sandy, weed-patched fields.• At Scott Flat Reservoir in the Sierra foothills, heavy rain with hail.• There, in the foothills of the Ruwenzoris, we heard, of all the sounds in the world, bagpipes.• But this isn't the foothills of the Himalayas.• His advisor, Paul Krausman, took him to the foothills on the north side of Pusch Ridge.• The foothills of the Annulii march off to the distant peaks that tower dramatically into the clouds. 