indefinite

[Example Sentences]:
1. Many have been on hunger strike to protest their indefinite detention, with some being force-fed.
2. Federation members went on an indefinite protest after negotiations over mining legislation failed.
3. And unlike a credit card account that can be quickly and easily closed, a Social Security number has an indefinite shelf life.
4. The prisoners are protesting against their indefinite detention.

[Antonyms]distinct

[Synonyms]equivocal, vague