1. (言行)谨慎的，考虑周到的
If you are discreet, you are polite and careful in what you do or say, because you want to avoid embarrassing or offending someone.
e.g. They were gossipy and not always discreet...
他们很爱传闲话，而且常常口无遮拦。
e.g. He followed at a discreet distance.
他小心翼翼地尾随在后，保持着一段距离。