1a stock or amount of something supplied or available for use:a farm with good water supplythe demand for tickets greatly exceeds the supply
[mass noun] the action of providing what is needed or wanted:the deal involved the supply of forty fighter aircraft
[mass noun] Economics the amount of a good or service offered for sale.
(supplies) the provisions and equipment necessary for an army or for people engaged in a particular project or expedition.
[as modifier] providing necessary goods and equipment:a supply ship
(supplies) British a grant of money by Parliament for the costs of government.
2 [usually as modifier] a person, especially a schoolteacher, acting as a temporary substitute for another:a supply teacher
1make (something needed or wanted) available to someone; provide:the farm supplies apples to cider makers
provide with something needed or wanted:make sure the workers are supplied with enough building materials
be adequate to satisfy (a requirement or demand):the two reservoirs supply about 1% of the city’s needs
2 archaic take over (a vacant place or role):when she died, no one could supply her place
in short supply
not easily obtainable; scarce:he meant to go, but time and petrol were in short supply
(of a schoolteacher) acting as a temporary substitute for another:she is on supply at a school in Middlesbrough
supply and demand
the amount of a commodity, product, or service available and the desire of buyers for it, considered as factors regulating its price:by the law of supply and demand the cost of health care will plummet