The Collaborative International Dictionary of English v.0.48:

Dovecot \Dove"cot`\, Dovecote \Dove"cote`\, n.
   A small house or box, raised to a considerable height above
   the ground, and having compartments, in which domestic
   pigeons breed; a dove house.
   [1913 Webster]

         Like an eagle in a dovecote, I
         Fluttered your Volscians in Corioli.     --Shak.
   [1913 Webster]

WordNet (r) 3.0 (2006):

dovecote
    n 1: a birdhouse for pigeons [syn: dovecote, columbarium,
         columbary]