Search Result for "signal tower":
Wordnet 3.0

NOUN (1)

1. a building from which signals are sent to control the movements of railway trains;
[syn: signal box, signal tower]



WordNet (r) 3.0 (2006):

signal tower
    n 1: a building from which signals are sent to control the
         movements of railway trains [syn: signal box, signal
         tower]