4 entries found for signal.
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signal[1,noun] signal[2,verb] signal[3,adjective] traffic signal

Main Entry: ¹sig·nal
Pronunciation: sig-nl
Function: noun
Etymology: Middle English signal "signal, sign," derived from Latin signalis "of a sign," from earlier signum "mark, sign, image" --related to SIGN
1 : an act, event, or word that serves to start some action
2 : a sound or motion of a part of the body made to give warning or command
3 : an object placed to give notice or warning <a traffic signal>
4 a : the message, sound, or effect transmitted in electronic communication (as radio or television) b : a radio wave or electric current that transmits a message or effect (as in radio or television)