legal in WordNet English dictionary

1. having legal efficacy or force
   "a sound title to the property"
   legal  sound  effectual 
   
2. established by or founded upon law or official or accepted rules
   legal 
   
3. of or relating to jurisprudence
   "legal loophole"
   legal 
   
4. relating to or characteristic of the profession of law
   "the legal profession"
   legal 
   
5. allowed by official rules
   "a legal pass receiver"
   legal