Dictionary:

lordly

  (lôrd'lē)

1. Of, relating to, or characteristic of a lord.
2. Very dignified and noble: a lordly and charitable enterprise.
3. Pretentiously arrogant and overbearing.

1. In a dignified, noble fashion befitting or characteristic of a lord.
2. In a pretentiously arrogant and overbearing manner.

adjective

1. Exercising authority: authoritative, commanding, dominant, masterful. See over/under, strong/weak.
2. Large and impressive in size, scope, or extent: august, baronial, grand, grandiose, imposing, magnific, magnificent, majestic, noble, princely, regal, royal, splendid, stately, sublime, superb. See big/small/amount, good/bad.
3. Overly convinced of one's own superiority and importance: arrogant, haughty, high-and-mighty, insolent, lofty, overbearing, overweening, prideful, proud, supercilious, superior. Idioms: on one's high horse. See attitude/good attitude/bad attitude/neutral attitude.

Definition: arrogant, disdainful
Antonyms: humble, modest, quiet

adj, adv

Definition: grand, majestic
Antonyms: lowly, menially

The adjective has 2 meanings:

Meaning #1: of or befitting a lord
  Synonyms: august, grand

Meaning #2: having or showing arrogant superiority to and disdain of those one views as unworthy
  Synonyms: disdainful, haughty, prideful, sniffy, supercilious, swaggering