constituent

adj

1. (not-comparable)Being a part or component of a whole.

   “Body, soul, and reason are the three parts necessarily constituent of a man.”

2. (not-comparable)Constitutive or constituting.

   “The skeleton varies in the proportions, and even to a certain extent in the connexions, of its constituent bones.”

3. (not-comparable)Constitutive or constituting.

   “the Constituent Assembly”

   “A question of right arises between the constituent and representative body.”

noun

1. A part, or component of a whole.

   “We know how to bring these constituents together, and to cause them to form water.”

   “Just as a regiment is ultimately made up of soldiers, so the sentence is of morphemes—they are its ultimate constituents.”

2. A person or thing which constitutes, determines, or constructs.

   “whose first composure and origination requires a higher and nobler Constituent than either Chance or the ordinary method of meer Natural causes.”

3. A resident of an area represented by an elected official, particularly in relation to that official.

   “The candidate himself, the son and heir of a peer, feels that he is truly of the same flesh and blood as his constituents; how amiably he smiles!—how bland are his manners!—and with what cordiality does he shake hands with the greasiest and the worst!”

   “He had been chief justice of Chester when Delamere, then Mr. Booth, represented that county in parliament. Booth had bitterly complained to the Commons that the dearest interests of his constituents were intrusted to a drunken jackpudding.”

   “But the purported rise in violent videos online has led some MPs to campaign for courts to have more power to remove or block material on YouTube. The Labour MP Heidi Alexander said she was appalled after a constituent was robbed at knifepoint, and the attackers could be found brandishing weapons and rapping about gang violence online.”

4. A voter who supports a (political) candidate; a supporter of a cause.

   “But he [Joe Biden] believes that non-college-educated voters, the neglected constituents he wants to take back from the Republicans, hardly know about the big bills emanating from Washington with banal names.”

5. One who appoints another to act for him as attorney in fact
6. A functional element of a phrase or clause.

   “Thus, the postulation of a Noun Phrase constituent is justified on morphological grounds, since it is not obvious how we could describe the grammar of the genitive s inflection in English without saying that it's a Noun Phrase inflection.”

   “In the first bracketting^([sic]), old and men are constituents of an intermediate unit old men, and in the second, men, and and women are similarly the constituents of men and women. The units are made up directly of these words: therefore these are, more precisely, their immediate constituents.”