An Etymological Dictionary of Astronomy and Astrophysics

1. Thrifty and efficient use of material resources of a community, society, or household; frugality in expenditures.
   

2. An act or means of thrifty saving; a saving.
   

3. The management of the resources of a community, country, etc., especially with a view to its productivity (Dictionary.com).

Etymology (EN): From M.Fr. economie, → economics.

Etymology (PE): Bumdât, back formation from bumdâti, → economic.