Definition of constitutional adjective from the Oxford Advanced American Dictionary

Academic

constitutional

adjective
/ˌkɑnstəˈtuʃənl/
 
 
1 [only before noun] connected with the constitution of a country or an organizationconstitutional government/reforma constitutional amendment2 allowed or limited by the constitution of a country or an organizationThey can't pass this law. It's not constitutional.constitutional rightsa constitutional monarchy (= a country with a king or queen, whose power is controlled by a set of laws and basic principles) antonym unconstitutional3 [usually before noun] related to the body's ability to stay healthy, be strong, and fight illnessconstitutional remedies constitutionally
/ˌkɑnstəˈtuʃənəli; ˌkɑnstəˈtuʃnəli/
 
adverbconstitutionally guaranteed rightsHe was much weakened constitutionally by the disease.