noun
showy clothes; flashy outfit
Refers to clothing worn for show or to attract attention; the term is rare and may be encountered mainly in older texts or specific contexts.
彼は伊達着を着て祭りに出かけた。
He went to the festival wearing showy clothes.
派手 (はで) is a common adjective meaning 'flashy' or 'gaudy', used for clothes, colors, or behavior, while 伊達着 is a specific, rare noun for showy clothing.
Compound of 伊達 (だて, 'dandyism, showiness') and 着 (ぎ, 'clothing'). The exact historical derivation is uncertain, but it likely emerged as a term for ostentatious attire associated with dandyism.