any of various ethnic groups in the mountains of northern Luzon, Philippines, all of whom keep, or have kept until recently, their traditional religion and way of life. Some live in the tropical forests of the foothills, but most live in rugged grassland and pine forest zones higher up. The Igorot numbered about 500,000 in the late 20th century. Their languages belong to the northern Luzon subgroup of the Philippine languages, which belong to the Austronesian (Malayo-Polynesian) family
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