The modern Iranian language, dating from about the ninth century A.D., that is the national language of Iran and is written in an Arabic alphabet; Persian.
A native speaker of Farsi.
A member of the predominant ethnic group of Iran.
[Persian fārsī, of Persia, alteration (influenced by Arabic Fāris, Persia) of pārsī, from Middle Persian pārsīg.]
1878, modern Persian language, the usual Iranian word for it, from Fars, Arabic name for region of Pars (no "p" in Arabic) in Iran, where the modern language evolved from I.E.-based Persian with many Ar. elements.