adj. & n.
adj. 1 composing or helping to make up a whole. 2 able to make or change a (political etc.) constitution (constituent assembly). 3 appointing or electing.
n. 1 a member of a constituency (esp. political). 2 a component part. 3 Law a person who appoints another as agent.
[ L constituent- partly through F -ant (as constitute) ]