The quality of being dressy; the degree to which clothing is formal, elegant, or fashionable.
From 'dressy' (stylish or formal) with the abstract noun suffix '-ness,' which converts adjectives into nouns representing the quality itself.
'-ness' is the most productive suffix in English for creating abstract nouns—'dressiness' is just one of thousands of abstract qualities we can name by adding '-ness,' making English incredibly flexible for discussing subtle differences in meaning.
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