| adjective | not clearly understood or expressed; ; -Anatole Broyard; - P.A.Sorokin; - John Locke “an obscure turn of phrase” |
| adjective | not precisely limited, determined, or distinguished “an undefined term” |
| adjective | lacking clarity or distinctness “a dim figure in the distance” |
| obscurity | noun | the quality of being unclear or abstruse and hard to understand |
| obscureness | noun | the quality of being unclear or abstruse and hard to understand |
| vagueness | noun | unclearness by virtue of being poorly expressed or not coherent in meaning |
| dimness | noun | the quality of being dim or lacking contrast |
| faintness | noun | the quality of being dim or lacking contrast |