Source : Webster's Revised Unabridged Dictionary (1913)

Mala \Ma"la\, n.; pl. of {Malum}. [L.]
   Evils; wrongs; offenses against right and law.

   {Mala in se} [L.] (Law), offenses which are such from their
      own nature, at common law, irrespective of statute.

   {Mala prohibita} [L.] (Law), offenses prohibited by statute,
      as distinguished from mala in se, which are offenses at
      common law.