An example of courteous is someone letting a pregnant woman go ahead of them in line for the restroom.
A courteous gentleman.
A courteous gesture.
The courteous ideal of French chivalry, with its delectable language, was adopted by all seigniorial Europe, which thus became animated, as it were, by the life-blood of France.
According to Strabo he was a courteous man and in many ways useful to the Jews.
Panin was one of the most learned, accomplished and courteous Russians of his day.
Prince Andrew followed her with a courteous but sad expression.