Source : Webster's Revised Unabridged Dictionary (1913)

Stately \State"ly\, a. [Compar. {Statelier}; superl.
   {Stateliest}.]
   Evincing state or dignity; lofty; majestic; grand; as,
   statelymanners; a stately gait. ``The stately homes of
   England!'' --Mrs. Hemans. ``Filled with stately temples.''
   --Prescott.

         Here is a stately style indeed!          --Shak.

   Syn: Lofty; dignified; majestic; grand; august; magnificent.

Stately \State"ly\, adv.
   Majestically; loftily. --Milton.

Source : WordNet®

stately
     adj 1: impressive in appearance; "a baronial mansion"; "an imposing
            residence"; "a noble tree"; "severe-looking policemen
            sat astride noble horses"; "stately columns" [syn: {baronial},
             {imposing}, {noble}]
     2: of size and dignity suggestive of a statue [syn: {statuesque}]
     3: refined or imposing in manner or appearance; befitting a
        royal court; "a courtly gentleman" [syn: {courtly}, {elegant},
         {formal}]
     [also: {stateliest}, {statelier}]