If something is on hold, it is delayed until later.
Our vacation plans are on hold because of the bad weather.
由於天氣不好,我們的度假計劃被推遲了。
Waiting to talk to someone on the phone.
I was put on hold for ten minutes before I could speak to the manager.
我在能夠和經理通話之前被擱置了十分鐘。