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.
An economy (From Greek Î¿Î¯ÎºÎ¿Ï â household and Î½ÄÎ¼oÎ¼Î±Î¹ â manage) is an area of the production, distribution, or trade, and consumption of goods and services by different agents in a given geographical location.