noun
flashy appearance; dandyish look
Refers to a showy, stylish, or dandyish appearance, often with a nuance of being overly concerned with fashion. The word is somewhat dated and carries a literary or old-fashioned feel.
彼の伊達姿はパーティーで目立っていた。
His flashy appearance stood out at the party.
あの俳優はいつも伊達姿で現れる。
That actor always shows up looking dandyish.
伊達者 refers to a person who is a dandy or a showy dresser, whereas 伊達姿 describes the appearance itself.
Compound of 伊達 (date, 'dandyism, stylishness') and 姿 (sugata, 'appearance, figure'). The exact origin of 伊達 is uncertain, but it may be associated with the Date clan of Sendai, known for their flamboyant style.