constitutional

Concise Oxford English Dictionary © 2008 Oxford University Press:
constitutional/kɒnstɪˈtjuːʃənl/

▶adjective

• 1 relating to or in accordance with a constitution.

• 2 relating to a person's physical or mental state.

▶noun dated a walk taken regularly to maintain good health.

– derivatives
constitutionality noun,
constitutionalize (or constitutionalise) verb,
constitutionally adverb.