A sequence of states representing an encoded message in a communication channel.
Any variation of a quantity or change in an entity over time that conveys information upon detection.
Asign made to give notice of some occurrence, command, or danger, or to indicate the start of a concerted action.
1667,John Milton, “Book V”, inParadise Lost.[…], London:[…] [Samuel Simmons], and are to be sold by Peter Parker[…];[a]nd by Robert Boulter[…];[a]nd Matthias Walker,[…],→OCLC; republished asParadise Lost in Ten Books:[…], London: Basil Montagu Pickering[…],1873,→OCLC:
All obeyed / The wontedsignal and superior voice / Of this great potentate.
2020 December 30, David Allen, “Unusual signals...”, inRail, page64:
Banner-Repeatersignals 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.
An on-off light,semaphore, or other device used to give an indication to another person.
(of a radio, TV, telephone, internet, etc.) Anelectromagnetic action, normally avoltage that is a function of time, that conveys the information of the radio or TV program or of communication with another party.
My mobile phone can't get asignal in the railway station.
An action, change or process done to convey information and thus reduce uncertainty.
1962 June, David Walters, “The new station and layout at Coventry”, inModern Railways, page405:
In order to accommodate the new platform 4 and the reversiblysignalled slow line, a deep cutting had to be cut back and held up in places with a concrete retaining wall.
2015, Andy Nottenkamper,A Rule Not Followed:
Isignaled for our waiter and ordered two Glenlivets, the only single malt they had behind the bar.
2024 February 7, Mel Holley, “Network News: LNER ditches Off-Peak for 70min semi-flexible fare”, inRAIL, number1002, page 6:
It is the latest step towards an airline-style advance booking-only system, which rail users have denounced assignalling the end of affordable, immediate travel.
(transitive) To communicate with (a person or system) by a signal.
Seeing the flames, he ran to the control room andsignalled headquarters.
But, setting this view aside, dishonorable would it be in the South were she willing to abandon to shame the memory of brave men who withsignal personal disinterestedness warred in her behalf, though from motives, as we believe, so deplorably astray.
R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke et al., editors (1950–present), “signal”, inGeiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies
