1. the quality or state of being unclear, blurry, or not sharply defined
2. the quality of being difficult to perceive, understand, or distinguish

Examples

• The indistinctness of the photograph made it hard to identify the person in it.
• She spoke with such indistinctness that I could barely understand what she was saying.
• The indistinctness of the rules led to confusion among the players.
• Through the fog, the indistinctness of the landscape was almost complete.
• The indistinctness of his memories made it difficult to recall the exact details.
• The artist deliberately used indistinctness in the background to focus attention on the main subject.