The Collaborative International Dictionary of English v.0.48:

officialese \officialese\ n.
   the formal and often obscure style of writing characteristic
   of some government officials; bureaucratese; -- it is
   characterized by euphemisms, circumlocutions, vague
   abstractions, and circumlocutions.
   [WordNet 1.5 +PJC]

WordNet (r) 3.0 (2006):

officialese
    n 1: the style of writing characteristic of some government
         officials: formal and obscure

Moby Thesaurus II by Grady Ward, 1.0:

27 Moby Thesaurus words for "officialese":
   Varietyese, Wall Streetese, Washingtonese, bunkum,
   business English, businessese, cinemese, collegese, commercialism,
   computerese, economese, federalese, gobbledygook, journalese,
   legalese, medical Greek, medicalese, newspaperese, official jargon,
   pedagese, political doubletalk, pussyfooting, shoptalk, societyese,
   sociologese, stagese, telegraphese