Indefinitely means for a period with no set end. Postponed indefinitely, detained indefinitely, closed indefinitely.
It is not the same as permanently: indefinitely leaves the end open rather than ruling it out, though in practice the two often amount to the same thing. Indefinite detention, holding somebody without a fixed term, is the gravest use of the word.
1adverbindefinitelyFor a period with no set end.
“The concert has been postponed indefinitely because the singer is ill.”
indefinitely is a duration.
Latin
indēfīnītus
English
indefinite
English, today
indefinitely
From indefinite + -ly. indefinite comes from Latin indēfīnītus. Morphologically in- + definite.
Etymology from Wiktionary, CC BY-SA