adjective

very polite or refined, as befitting a royal court.

he gave a courtly bow

refined,polished,cultivated,cultured,civilized,stylish,elegant,sophisticated,urbane,suave,debonair,polite,civil,courteous,gracious,well mannered,well bred,chivalrous,gallant,gentlemanly,ladylike,honourable,genteel,aristocratic,dignified,decorous,formal,ceremonious,stately,proper,couth,gentle