economy in WordNet English dictionary

1. the system of production and distribution and consumption
   economy  economic system 
   
2. an act of economizing; reduction in cost
   "it was a small economy to walk to work every day"; "there was a saving of 50 cents"
   economy  saving 
   
3. frugality in the expenditure of money or resources
   "the Scots are famous for their economy"
   economy  thriftiness 
   
4. the efficient use of resources
   "economy of effort"
   economy