At its simplest, biotechnology is technology based on biology - biotechnology harnesses cellular and biomolecular processes to develop technologies and products that help improve our lives and the health of our planet.
In macroeconomics, the focus is on the demand and supply of all goods and services produced by an economy. Accordingly, the demand for all individual goods and services is also combined and referred to as aggregate demand.
Second answer   The definition I was taught is that economics is the study and  investigation of the systems by which societies allocate scarce  commodities among alternative uses.it also means the information  of the country.