signal tower signal-to-noise ratio • signal whistle · · · Info · Definitions · Synonyms · Characters · · signal tower · · Text Common · · Latin · · Scripts 12 · · Length 4 · · Syllables Definitions · · · (noun) a building from which signals are sent to control the movements of railway trains. Synonyms: signal box, signal tower. · · Noun Definition 1 Synonyms · · · signal box · · Synonym 1 Characters · · space U+0020 a latin small letter a U+0061 e latin small letter e U+0065 g latin small letter g U+0067 i latin small letter i U+0069 l latin small letter l U+006C n latin small letter n U+006E o latin small letter o U+006F r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074 w latin small letter w U+0077