Merriam-Webster's Collegiate® Dictionary, 11th Edition
CONSTITUTIONAL
I. adjective
Date: 1682
relating to, inherent in, or affecting the constitution of body or mind, of, relating to, or entering into the fundamental makeup of something ; essential , being in accordance with or authorized by the constitution of a state or society , regulated by or ruling according to a constitution , of or relating to a constitution , loyal to or supporting an established constitution or form of government,
II. noun
Date: 1829
a walk taken for one's health