Entry 1 sense Webster, 1913 Himalayan /hĭmˌ-əl-ā'-ən/ · Hi·ma·la·yan · IPA /ˈhɪm.əˌleɪ.ən/ 01 a. Of or pertaining to the Himalayas, the great mountain chain in Asia. 1. Of or pertaining to the Himalayas, the great mountain chain in Asia.