Used both for an economy as a social or national system and, in context, for the academic subject of economics.
The Japanese economy is gradually recovering.
大学で経済を学んでいます。
I study economics at university.
finances; financial circumstances
Refers to a person, family, organization, or household's financial situation; often overlaps in practice with 家計 for household finances.
我が家の経済は今あまり楽ではない。
Our family's finances are not very comfortable right now.
彼は家庭の経済を支えている。
He supports the household financially.
A more formal or limited noun use meaning economical use or saving of resources; 節約 is usually the plainer everyday word for deliberate thrift.
両面印刷にすれば紙の経済になる。
Printing on both sides saves paper.
This country's economy is developing rapidly.
With more children, the family's finances became tight.
They are trying to turn the economy around with new policies.
High medical costs are straining the household finances.
He knows a lot about economics, so I often consult him.
経済 refers to the economy or economic activity itself, while 経済学 is the academic discipline that studies it.
economic crisis
economic conditions; financial situation
uneconomical; wasteful