constitutional in WordNet English dictionary

1. existing as an essential constituent or characteristic
   "the Ptolemaic system with its built-in concept of periodicity"; "a constitutional inability to tell the truth"
   built-in  constitutional  inbuilt  inherent  integral 
   
2. constitutional in the structure of something (especially your physical makeup)
   constituent  constitutional  constitutive  organic 
   
3. sanctioned by or consistent with or operating under the law determining the fundamental political principles of a government
   "the constitutional right of free speech"; "constitutional government"; "constitutional guarantees"
   constitutional 
   
4. of benefit to or intended to benefit your physical makeup
   "constitutional walk"
   constitutional 
   

1. a regular walk taken as a form of exercise
   constitutional