n. 1 the act or method of constituting; the composition (of something). 2 a the body of fundamental principles or established precedents according to which a State or other organization is acknowledged to be governed. b a (usu. written) record of this. 3 a person's physical state as regards vitality, health, strength, etc. 4 a person's mental or psychological make-up. 5 hist. a decree or ordinance.
[ ME f. OF constitution or L constitutio (as constitute) ]