Here are some ways to understand the meaning:
* No set end: "The meeting was postponed indefinitely." This means there's no specific date set for when it will happen.
* Unlimited time: "The project will continue indefinitely." This implies it will go on for as long as needed, without a predetermined end.
* Uncertain duration: "The exhibit will be on display indefinitely." This suggests the exhibit might be up for a long time, but there's no guarantee how long it will last.
In short, "indefinitely" means "for as long as necessary" or "for an unspecified time."