smoke signal
A method of long-distance communication sometimes used in ancient and undeveloped societies, consisting of messages conveyed by means of columns or intermittent puffs of smoke.
signal
UK /ˈsɪɡnəl/ US /ˈsɪɡnəl/
noun 5verb 2adj 1
Definitions
noun
1
A sequence of states representing an encoded message in a communication channel.
2
Any variation of a quantity or change in an entity over time that conveys information upon detection.
3
A sign made to give notice of some occurrence, command, or danger, or to indicate the start of a concerted action.
All obeyed / The wonted signal and superior voice / Of this great potentate.
Banner-Repeater signals tend to be provided in locations where drivers receive insufficient warning of the main signal, thereby effectively increasing the sighting distance for the main signal.
4
An on-off light, semaphore, or other device used to give an indication to another person.
5
An on-off light, semaphore, or other device used to give an indication to another person.
verb
1
To indicate; to convey or communicate by a signal.
I signalled my acquiescence with a nod.
He whistled to signal that we should stop.
2
To communicate with (a person or system) by a signal.
Seeing the flames, he ran to the control room and signalled headquarters.
adj
1
Standing above others in rank, importance, or achievement.
a signal exploit; a signal success; a signal act of benevolence
As ſignal now in low dejected ſtate, / As earſt in higheſt, behold him where he lies.
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