Source : Webster's Revised Unabridged Dictionary (1913)

Palestra \Pa*les"tra\, n.; pl. L. {Palestr[ae]}, E. {Palestras}.
   [NL., fr. L. palaestra, Gr. ?, fr. ? to wrestle.] [Written
   also {pal[ae]stra}.] (Antiq.)
   (a) A wrestling school; hence, a gymnasium, or place for
       athletic exercise in general.
   (b) A wrestling; the exercise of wrestling.

Source : WordNet®

palestra
     n : a public place in ancient Greece or Rome devoted to the
         training of wrestlers and other athletes [syn: {palaestra}]
     [also: {palestrae} (pl)]