Used as a noun or na-adjective to describe something outdated in style, manner, or thinking. Often applied to clothing, customs, or attitudes.
彼の服装はいつもオールドファッションだ。
His clothes are always old-fashioned.
その考え方は少しオールドファッションかもしれない。
That way of thinking might be a bit old-fashioned.
Variant with interpunct; less common in running text.
Borrowed from English 'old-fashioned'.