The Collaborative International Dictionary of English v.0.48:

Lordly \Lord"ly\, adv.
   In a lordly manner.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Lordly \Lord"ly\, a. [Compar. Lordlier; superl. Lordliest.]
   [Lord + -ly. Cf. Lordlike.]
   1. Suitable for a lord; of or pertaining to a lord;
      resembling a lord; hence, grand; noble; dignified;
      honorable.
      [1913 Webster]

            She brought forth butter in a lordly dish. --Judges
                                                  v. 25.
      [1913 Webster]

            Lordly sins require lordly estates to support them.
                                                  --South.
      [1913 Webster]

            The maidens gathered strength and grace
            And presence, lordlier than before.   --Tennyson.
      [1913 Webster]

   2. Proud; haughty; imperious; insolent.
      [1913 Webster]

            Lords are lordliest in their wine.    --Milton.

   Syn: Imperious; haughty; overbearing; tyrannical; despotic;
        domineering; arrogant. See Imperious.
        [1913 Webster]

WordNet (r) 3.0 (2006):

lordly
    adj 1: of or befitting a lord; "heir to a lordly fortune"; "of
           august lineage" [syn: august, grand, lordly]
    2: having or showing arrogant superiority to and disdain of
       those one views as unworthy; "some economists are disdainful
       of their colleagues in other social disciplines"; "haughty
       aristocrats"; "his lordly manners were offensive"; "walked
       with a prideful swagger"; "very sniffy about breaches of
       etiquette"; "his mother eyed my clothes with a supercilious
       air"; "a more swaggering mood than usual"- W.L.Shirer [syn:
       disdainful, haughty, imperious, lordly,
       overbearing, prideful, sniffy, supercilious,
       swaggering]

Moby Thesaurus II by Grady Ward, 1.0:

71 Moby Thesaurus words for "lordly":
   U, absolute, absolutist, absolutistic, affected, arbitrary,
   aristocratic, arrogant, august, authoritarian, authoritative,
   autocratic, bossy, cavalier, courtly, despotic, dictatorial,
   dignified, disdainful, domineering, egotistic, elitist, feudal,
   grand, grandiose, grave, grinding, haughty, high and mighty,
   high-and-mighty, high-handed, hubristic, imperative, imperial,
   imperious, imposing, insolent, kingly, magisterial, magistral,
   magnificent, majestic, masterful, monocratic, noble, oppressive,
   overbearing, overruling, peremptory, princely, puffed, queenly,
   regal, repressive, royal, sedate, severe, snobbish, sober, solemn,
   stately, statuesque, strict, supercilious, superior, suppressive,
   swollen, tyrannical, tyrannous, venerable, worthy