courtly

Short definition from Wiktionary

Adjective

1. 1
   Befitting of a royal court; reflecting the manners or behaviour of people at court.
2. 2
   Of or relating to a royal court.
3. 3
   Overly eager to please or obey.

Adverb

1. 1
   In the manner of a royal court; in a manner befitting of a royal court.