If something is on hold, it is delayed until later.
Our vacation plans are on hold because of the bad weather.
날씨가 나빠서 우리의 휴가 계획이 보류 중입니다.
Waiting to talk to someone on the phone.
I was put on hold for ten minutes before I could speak to the manager.
매니저와 통화하기 전에 10분 동안 대기했습니다.