Wordnet 3.0
NOUN (2)
1. 
 any of the modern Indic languages; 
2. 
 any of the vernacular Indic languages of north and central India (as distinguished from Sanskrit) recorded from the 3rd century BC to the 4th century AD; 
The Collaborative International Dictionary of English v.0.48:
Prakrit \Pra"krit\, n. [Skr. pr[=a]k[.r]ta original, natural,
   usual, common, vulgar.]
   Any one of the popular dialects descended from, or akin to,
   Sanskrit; -- in distinction from the Sanskrit, which was used
   as a literary and learned language when no longer spoken by
   the people. Pali is one of the Prakrit dialects.
   [1913 Webster]
WordNet (r) 3.0 (2006):
Prakrit
    n 1: any of the modern Indic languages
    2: any of the vernacular Indic languages of north and central
       India (as distinguished from Sanskrit) recorded from the 3rd
       century BC to the 4th century AD