saigaPronunciation: /ˈseɪgə, ˈsʌɪgə/ (also saiga antelope)Definition of saiga noun an Asian antelope which has a distinctive convex snout with the nostrils opening downwards, 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 US English dictionary