Definition
to opt for casual attire in contexts typically requiring more formal wear
穿着休闲；打扮随意
In the office on Fridays, many people choose to dress down, making the atmosphere more relaxed.
周五在办公室，许多人选择穿着休闲，使气氛更加轻松。
He dressed down at the party in a casual T-shirt and shorts instead of a formal shirt and trousers, looking very comfortable.
他在派对上穿着休闲的T恤和短裤，而不是正式的衬衫和长裤，看起来非常舒适。
Our boss allowed the team to dress down during the planning meeting to help everyone feel more at ease.
我们的老板允许团队在计划会议期间穿着休闲，让每个人都感到更自在。