Sup*ply", a. Serving to contain, deliver, or regulate a supply of anything; as, a supply tank or valve.

Supply system (Zoöl.), the system of tubes and canals in sponges by means of which food and water are absorbed. See Illust. of Spongiæ.

Sup*ply", n.; pl. Supplies (?). 1. The act of supplying; supplial. A. Tucker.

2. That which supplies a want; sufficiency of things for use or want. Specifically: --

(a) Auxiliary troops or reënforcements. "My promised supply of horsemen." Shak.

(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.

Sup*ply" (?), v. t. [imp. & p. p. Supplied (?); p. pr. & vb. n. Supplying (?).] [For older supploy, F. suppléer, OF. also supployer, (assumed) LL. suppletare, from L. supplere, suppletum; sub under + plere to fill, akin to plenus full. See Plenty.] 1. To fill up, or keep full; to furnish with what is wanted; to afford, or furnish with, a sufficiency; as, rivers are supplied by smaller streams; an aqueduct supplies an artificial lake; -- often followed by with before the thing furnished; as, to supply a furnace with fuel; to supply soldiers with ammunition.

2. To serve instead of; to take the place of.

Burning ships the banished sun supply.

The sun was set, and Vesper, to supply
His absent beams, had lighted up the sky.

3. To fill temporarily; to serve as substitute for another in, as a vacant place or office; to occupy; to have possession of; as, to supply a pulpit.

4. To give; to bring or furnish; to provide; as, to supply money for the war. Prior.

Syn. -- To furnish; provide; administer; minister; contribute; yield; accommodate.