Unfashionable means out of favour with current taste. An unfashionable view, unfashionable clothes, deeply unfashionable.
Of an opinion it is nearly a boast, since holding an unfashionable view implies you hold it because it is right. Of clothes it is simply a description, and everything unfashionable becomes fashionable again in about thirty years.
1adjectiveunfashionableOut of favour with current taste.
“Flared jeans were unfashionable for years before they came back into style.”
unfashionable is a quality.
From un- + fashionable.
Etymology from Wiktionary, CC BY-SA