MasaiPronunciation: /ˈmɑːsʌɪ, məˈsʌɪ, mɑːˈsʌɪ/ (also Maasai)Definition of Masai noun (plural same or Masais) 1a member of a pastoral people living in Tanzania and Kenya. 2 [mass noun] the Nilotic language of the Masai, with about 700,000 speakers. adjective relating to the Masai or their language. Origin:the name in MasaiMasai in other Oxford dictionaries Definition of Masai in the US English dictionary