hill-people en · NOUN
Meanings
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(plural, plural-only) Supernatural beings, such as a dwarves, that live beneath hills.
The hill-people are excessively frightened during thunder. When, therefore, they see bad weather coming on, they lose no time in getting to the shelter of their hills.
1828, Thomas Keightley, The Fairy Mythology, volume I, London: William Harrison Ainsworth, page 193: