saiga Syllabification: (sai·ga)Pronunciation: /ˈsīgə/ (also saiga antelope)Definition of saiga noun an Asian antelope that has a distinctive convex snout with the nostrils opening downward, living in herds on the cold steppes. Saiga tartarica, family Bovidae Origin: early 19th century: from Russiansaiga in other Oxford dictionaries Definition of saiga in the British & World English dictionary