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.
economic - of or relating to an economy, the system of production and management of material wealth; economic growth; aspects of social, political, and economical life economical. 2. economic - of or relating to the science of economics; economic theory 3. economic - using the minimum of time or resources necessary for effectiveness; an economic use of home heating oil; a modern economical heating system; an economical use of her time economical efficient - being effective without wasting time or effort or expense; an efficient production manager; efficient engines save gas