A hill near the base of a mountain or mountain range.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "foothill" in a sentence
"The lower third of the mountains, that is, the foothill section, is only tree-dotted."
"Brenda became a devoted fan of hikes in Sabino Canyon, meals at Café Poca Cosa, and massages, pedicures and yoga up at the foothill resorts."