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.
Definition of economics. 1a : a social science concerned chiefly with description and analysis of the production, distribution, and consumption of goods and servicesb : economic theory, principles, or practices sound economics. 2 : economic aspect or significance the economics of building a new stadium.