- Definitions|1
- Thesaurus|473
- Abbreviations|0
| sweeping | |
| tarnished(adjective, dull, dark, gloomy, faint) | |
| turbid | |
| undecipherable | |
| under the radar | |
| undetailed(unspecific, undefined) | |
| unfocused(vague, unclear, blurry) | |
| unilluminated(adjective, dull, dark, gloomy, faint) | |
| unintelligible(uncertain, vague, unclear, hazy, indistinct) | |
| unknown(adjective, rough, faint, vague, unclear) | |
| unreadable | |
| unsettled(adjective, rough, faint, vague, unknown) | |
| unsure(adjective, rough, faint, vague, unknown) | |
| vacillant | |
| abstruse | |
| addled | |
| amphibological(unclear, indistinct, indistinguishable) | |
| aside(weak, pale, faded) | |
| badly lit(expression, adjective, dark, gloomy, murky) | |
| baggy |
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| APA | Smart Define. (2015). ill-defined thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/ill-defined/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "ill-defined thesaurus" https://smartdefine.org/ill-defined/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2015, ill-defined thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/ill-defined/thesaurus/synonyms>. |
| MLA | Smart Define. "ill-defined thesaurus" 13 April 2015. Web. 21 September 2026. <https://smartdefine.org/ill-defined/thesaurus/synonyms> |