When to use contract in Korean
Korean: 계약[ gye-yak ]

When to use it
A contract is an official agreement between people or companies. In Korean, 계약 is used for important agreements about things like a house, a job, or a phone plan. You will often hear it in phrases like 계약을 하다, which means to make or sign a contract.
Example sentences
우리 가족은 새 집 계약을 했어요.
My family signed a contract for a new house.
저는 휴대폰 계약을 했어요.
I signed a mobile phone contract.
언니는 회사와 계약했어요.
My older sister signed a contract with a company.
우리는 여행사와 계약을 했어요.
We made a contract with a travel agency.
아직 계약을 안 했어요.
I have not signed the contract yet.
계약은 다음 주에 끝나요.
The contract ends next week.