dress code 意思是“着装规定”“衣着规范”“穿着要求”。如：

My school had a very strict dress code. 我学校的穿着规定非常严格。

Most evenings there's a party and the dress code is strict—black tie only. 晚上大多都有派对，而且穿着要求很严格——必须穿晚礼服。

There is a strict dress code: no trainers or jeans. 有严格的着装规定：不许穿运动鞋和牛仔裤。