YaquiPronunciation: /ˈjaki/Definition of Yaqui noun (plural same or Yaquis) 1a member of an American Indian people of NW Mexico and Arizona. 2 [mass noun] the Uto-Aztecan language of the Yaqui. adjective relating to the Yaqui or their language. Origin:Spanish, from earlier Hiaquis, from Yaqui HiakiYaqui in other Oxford dictionaries Definition of Yaqui in the US English dictionary