"経済" (けいざい) refers to the system of how money, goods, and services are produced and exchanged in a country or region. It can also mean the study of this system, which is economics. For example, you might talk about the "Japanese economy" or "studying economics."

国や地域の、お金や生産活動に関わる仕組みです。学問としても使われます。例：日本の経済。