When to use expansion in Korean
Korean: 확장[ hwak-jang ]

When to use it
Expansion (확장) means making something bigger or adding more space. It is used for places, buildings, roads, rooms, and even screens. In Korean, you will often see it in phrases like room expansion, road expansion, or expansion work.
Example sentences
집에서 방 확장 공사를 해요.
We are doing room expansion work at home.
학교는 도서관 확장 계획이 있어요.
The school has a plan to expand the library.
길 확장 공사 때문에 차가 많아요.
There are many cars because of the road expansion work.
이 가방은 확장 지퍼가 있어요.
This bag has an expansion zipper.
공항 확장 공사로 새 게이트가 생겼어요.
A new gate was added because of the airport expansion work.
컴퓨터에서 화면 확장 버튼을 눌렀어요.
I pressed the screen expansion button on the computer.