valley. (building construction). An inside angle formed where two sloping sides intersect. (geography). A generally broad area of flat, low-lying land bordered by higher ground.
In ordinary usage, price is the quantity of payment or compensation given by one party to another in return for goods or services.
economics definition. The science that deals with the production, distribution, and consumption of commodities. Note: Economics is generally understood to concern behavior that, given the scarcity of means, arises to achieve certain ends. When scarcity ceases, conventional economic theory may no longer be applicable. (See affluent society.)