noun. The quality or condition of being indistinct; confusion; uncertainty; obscurity; faintness; dimness: as, indistinctness of vision or of voice.

noun. In psychology, that character of apprehension which consists in a deficiency of consciousness of the parts of the concept or idea apprehended.

noun. The quality or condition of being indistinct; lack of definiteness; dimness; confusion

noun. The property of being indistinct.

noun. the quality of being indistinct and without sharp outlines

"It is quite clear that what hinders a true understanding of anything is vagueness; and it is by this process of asking questions that vagueness is to be dispelled: for, in the first place, it removes one great vagueness, or indistinctness, which is very apt to beset the minds of many; namely, the not clearly seeing whether they understand a thing or no; and much more, the not seeing what it is that they do understand, and what it is which they do not."

opacity  opaqueness  

dimness  faintness  vagueness  

bookishness  creaturesand  desultoriness  dreaminess  half-light  

confusion  dimness