The Collaborative International Dictionary of English v.0.48:

Courtly \Court"ly\ (-l?), a. [From Court.]
   1. Relating or belonging to a court.
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   2. Elegant; polite; courtlike; flattering.
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            In courtly company or at my beads.    --Shak.
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   3. Disposed to favor the great; favoring the policy or party
      of the court; obsequious. --Macaulay.
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The Collaborative International Dictionary of English v.0.48:

Courtly \Court"ly\, adv.
   In the manner of courts; politely; gracefully; elegantly.
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         They can produce nothing so courtly writ. --Dryden
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WordNet (r) 3.0 (2006):

courtly
    adj 1: refined or imposing in manner or appearance; befitting a
           royal court; "a courtly gentleman" [syn: courtly,
           formal, stately]