highlands is a form of:

Highland



noun
1.
(a region containing many hills or mountains) តំបន់មានភ្នំខ្ពស់ៗ, អ្នកស្រុកភ្នំ
ENGLISH MEANING
noun
1.
Elevated or mountainous land; (often in the pl.) an elevated region or country; as, the Highlands of Scotland.