From Longman Dictionary of Contemporary EnglishSwahiliSwa‧hi‧li /swɑːˈhiːli, swə-/ noun 1 [uncountable] a Bantu language spoken in eastern and central Africa, and used especially as a lingua franca (=a language used between people whose first languages are different). It is the official language of Kenya and Tanzania.2 [countable] a member of the Bantu people of Zanzibar who originally spoke this language —Swahili adjective