Supply-side definition

Of, relating to, or being an economic theory holding that increased availability of money for investment, achieved through reduction of taxes especially in the higher tax brackets, will increase productivity, economic activity, and income throughout the economic system.

Of or relating to the supply of a good or service, as opposed to the demand for it.

Designating or of a theory that economic growth can be achieved by stimulating investment, with the money for investment coming chiefly through tax reductions.