Source : Webster's Revised Unabridged Dictionary (1913)

Pali \Pa"li\, n. [Ceylonese, fr. Skr. p[=a]li row, line, series,
   applied to the series of Buddhist sacred texts.]
   A dialect descended from Sanskrit, and like that, a dead
   language, except when used as the sacred language of the
   Buddhist religion in Farther India, etc.

Pali \Pa"li\, n.,
   pl. of {Palus}.

Palus \Pa"lus\, n.; pl. {Pali}. [L., a stake.] (Zo["o]l.)
   One of several upright slender calcareous processes which
   surround the central part of the calicle of certain corals.

Source : WordNet®

Pali
     n : an ancient Prakrit language (derived from Sanskrit) that is
         the scriptural and liturgical language of Theravada
         Buddhism