in a very obvious way so that people will notice it
به طرز نمایشی, به طور عمدی برای جلب توجه, به شکل آشکارا, به روشی جلب توجهکننده, به طرز خودنمایانه, به طور واضح برای جلب توجه
His hands were clasped ostentatiously behind his head.
She was very severe and ostentatiously pious.