Source : Webster's Revised Unabridged Dictionary (1913)

Gritty \Grit"ty\ (-t[y^]), a.
   1. Containing sand or grit; consisting of grit; caused by
      grit; full of hard particles.

   2. Spirited; resolute; unyielding. [Colloq., U. S.]

Source : WordNet®

gritty
     adj 1: composed of or covered with relatively large particles;
            "granular sugar"; "gritty sand" [syn: {farinaceous}, {coarse-grained},
             {grainy}, {granular}, {granulose}, {mealy}, {sandy}]
     2: willing to face danger [syn: {game}, {gamy}, {gamey}, {mettlesome},
         {spirited}, {spunky}]
     [also: {grittiest}, {grittier}]