Search Result for "watchtower": 
Wordnet 3.0

NOUN (1)

1. an observation tower for a lookout to watch over prisoners or watch for fires or enemies; 



The Collaborative International Dictionary of English v.0.48:

Watchtower \Watch"tow`er\, n.
   A tower in which a sentinel is placed to watch for enemies,
   the approach of danger, or the like.
   [1913 Webster]


WordNet (r) 3.0 (2006):

watchtower
    n 1: an observation tower for a lookout to watch over prisoners
         or watch for fires or enemies