con·sti·tu·tion·al / ˌkänstəˈt(y)oōshənl/ • adj. 1. of or relating to an established set of principles governing a state: a constitutional amendment. ∎  in accordance with or allowed by such principles: a constitutional monarchy.2. of or relating to someone's physical or mental condition.• n. dated a walk, typically one taken regularly to maintain or restore good health.DERIVATIVES: con·sti·tu·tion·al·i·ty / -ˌt(y)oōshəˈnalitē/ n.con·sti·tu·tion·al·ly adv.

CONSTITUTIONAL

That which is consistent with or dependent upon the fundamental law that defines and establishes government in society and basic principles to which society is to conform.

A law is constitutional when it does not violate any provision of the U.S. Constitution or any state constitution.