| adj. 1.  Serving as part of a whole; component: a constituent element. 2.  Empowered to elect or designate. 3.  Authorized to make or amend a constitution: a constituent assembly. n. 1.  A constituent part; a component. See Synonyms at  element. 2.  A resident of a district or member of a group represented by an elected official. 3.  One that authorizes another to act as a representative; a client. 4.  A structural unit, such as a verb, noun phrase, or clause, in a grammatical construction. [Latin cōnstituēns, cōnstituent-, present participle of cōnstituere, to set up; see  CONSTITUTE. N., from French, from Latin cōnstituēns, from  present participle of cōnstituere.] con·stitu·ent·ly adv. | 
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