If you describe a situation or period as indefinite, you mean that people have not decided when it will end.
The trial was adjourned for an indefinite period.
审判被无限期推迟。
an indefinite strike by government workers.
政府员工进行的无限期罢工。
Something that is indefinite is not exact or clear.
at some indefinite time in the future.
在未来某个不确定的时间。