The quality or state of being hazy; the condition of being unclear, obscured, or clouded in appearance or meaning.
From 'hazy' plus the noun-forming suffix '-ness', which creates abstract nouns describing qualities or states, following productive English word-building patterns.
Air quality scientists measure haziness with a metric called 'visibility range'—cities like Los Angeles or Beijing have historic data showing how industrial development directly increased atmospheric haziness, visible in old photographs.
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