The Collaborative International Dictionary of English v.0.48:

Mahrati \Mah*rat"i\, n.
   The language of the Mahrattas; the language spoken in the
   Deccan and Concan. [Written also Marathi.]
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Marathi \Ma*ra"thi\, Mahratta \Mah*rat"ta\, prop. n.
   A Sanskritic language of western India, prob. descended from
   the Maharastri Prakrit, spoken by the Marathas and
   neighboring peoples. It has an abundant literature dating
   from the 13th century. It has a book alphabet nearly the same
   as Devanagari and a cursive script translation between the
   Devanagari and the Gujarati.
   [Webster 1913 Suppl.]

WordNet (r) 3.0 (2006):

Marathi
    n 1: an Indic language; the state language of Maharashtra in
         west central India; written in the Devanagari script [syn:
         Marathi, Mahratti]