Sup·ply, n.; pl. Supplies
 1. The act of supplying; supplial.
 2. That which supplies a want; sufficiency of things for use or want. Specifically: --
 (a) Auxiliary troops or reenforcements. “My promised supply of horsemen.”
 (b) The food, and the like, which meets the daily necessities of an army or other large body of men; store; -- used chiefly in the plural; as, the army was discontented for lack of supplies.
 (c) An amount of money provided, as by Parliament or Congress, to meet the annual national expenditures; generally in the plural; as, to vote supplies.
 (d) A person who fills a place for a time; one who supplies the place of another; a substitute; esp., a clergyman who supplies a vacant pulpit.
 Stated supply Eccl., a clergyman employed to supply a pulpit for a definite time, but not settled as a pastor. [U.S.]
 Supply and demand. Polit. Econ. “Demand means the quantity of a given article which would be taken at a given price. Supply means the quantity of that article which could be had at that price.” --F. A. Walker.