a signal sent electrically or by radio to indicate a precise moment of time as a means of checking or regulating timepieces.
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How to use time signal in a sentence
During the voyage in daytime he would at one time signal to "sail in column," and at another signal "abreast in line."Hellenica | Xenophon
A time-signal contact is also indicated on the selector-circuit diagram of Fig. 490.Cyclopedia of Telephony and Telegraphy, Vol. 2 | Kempster Miller
And lifting high his outspread hands he flung their palms toward his friends, the old-time signal for "go back."Rolf In The Woods | Ernest Thompson Seton
At the same time signal of recall was made to the pilot of the boat; but she did not return until after the action.
The half-time signal, however, was given, leaving the Vale of Leven one goal ahead.Scottish Football Reminiscences and Sketches | David Drummond Bone
British Dictionary definitions for time signal
an announcement of the correct time, esp on radio or television
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012