The Collaborative International Dictionary of English v.0.48:

Declamatory \De*clam"a*to*ry\, a. [L. declamatorius: cf. F.
   d['e]clamatoire.]
   1. Pertaining to declamation; treated in the manner of a
      rhetorician; as, a declamatory theme.
      [1913 Webster]

   2. Characterized by rhetorical display; pretentiously
      rhetorical; without solid sense or argument; bombastic;
      noisy; as, a declamatory way or style.
      [1913 Webster]

WordNet (r) 3.0 (2006):

declamatory
    adj 1: ostentatiously lofty in style; "a man given to large
           talk"; "tumid political prose" [syn: bombastic,
           declamatory, large, orotund, tumid, turgid]