tahr (tär)n. Any of three goatlike mammals of the genus Hemitragus of the Himalayas, southern India, and the Arabian peninsula, having backward-curved horns. Some biologists place the species in three different genera.[Nepalese th?r.]American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.tahr (t??) n (Animals) any of several goatlike bovid mammals of the genus Hemitragus, such as H. jemlahicus (Himalayan tahr), of mountainous regions of S and SW Asia, having a shaggy coat and curved horns[C19: variation of Nepali th?r]Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014tahr (t?r) n. any short-horned goatlike bovid of the genus Hemitragus, of the Himalayas, India, and Arabia. [1832;