The Collaborative International Dictionary of English v.0.48:

Bratislava \Bratislava\ prop. n. (Geography)
   The capital city of Slovakia. Population (2000) = 446,600.
   [PJC]

WordNet (r) 3.0 (2006):

Bratislava
    n 1: capital and largest city of Slovakia [syn: Bratislava,
         capital of Slovakia, Pressburg, Pozsony]