Signals

Any sign or indication of something. Key economic indicators act as pointers to where an economy is heading. Buyers and sellers also give signals, e.g. very low attendance at football matches are a signal to suppliers that consumers want something better.
Found on http://www.encyclo.co.uk/local/20140

Signals

The means by which the umpires communicate their decisions to the scorers and players. They sound - and sometimes look - curiously masonic, but with the exception of the strange and pointless One Short signal, serve their purpose well. David Shepherd's (see also Nelson) variation on the leg-bye signal is worth the admission fee on its own.
Found on http://www.wandererscricket.com/glossary.html

Signals

Visual indication passed to a train driver to advise the speed, direction or route of the train. There are almost as many types of signals as there are railways but they fall into the following main categories: • handsignals - used mainly where there are no fixed signals or where the fixed signalling has failed. Generally, each railway has its......
Found on http://www.railway-technical.com/newglos.shtml
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