Source : Webster's Revised Unabridged Dictionary (1913)

Legality \Le*gal"i*ty\ (l[-e]*g[a^]l"[i^]*t[y^]), n. [Cf. LL.
   legalitas, F. l['e]galit['e]. Cf. {Loyalty}.]
   1. The state or quality of being legal; conformity to law.

   2. (Theol.) A conformity to, and resting upon, the letter of
      the law.

Source : WordNet®

legality
     n : lawfulness by virtue of conformity to a legal statute [ant:
         {illegality}]