Definitions of constitutional:

• noun:   a regular walk taken as a form of exercise
• adjective:   of benefit to or intended to benefit your physical makeup

  Example: "Constitutional walk"

• adjective:   of or relating to a constitution

  Example: "Constitutional amendments"

• adjective:   sanctioned by or consistent with or operating under a constitution

  Example: "The constitutional right of free speech"

• adjective:   existing as an essential constituent or characteristic

  Example: "A constitutional inability to tell the truth"

• adjective:   constitutional in the structure of something (especially your physical makeup)