signal


signal
1.
n. & v.
—n.
1 a a usu. prearranged sign conveying information, guidance, etc. esp. at a distance (waved as a signal to begin). b a message made up of such signs (signals made with flags).
2 an immediate occasion or cause of movement, action, etc. (the uprising was a signal for repression).
3 Electr. a an electrical impulse or impulses or radio waves transmitted as a signal. b a sequence of these.
4 a light, semaphore, etc., on a railway giving instructions or warnings to train-drivers etc.
5 Bridge a prearranged mode of bidding or play to convey information to one's partner.
—v. (signalled, signalling; US signaled, signaling)
1 intr. make signals.
2 tr. a (often foll. by to + infin.) make signals to; direct. b transmit (an order, information, etc.) by signal; announce (signalled her agreement; signalled that the town had been taken).
Phrases and idioms:
signal-book a list of signals arranged for sending esp. naval and military messages. signal-box Brit. a building beside a railway track from which signals are controlled. signal of distress esp. Naut. an appeal for help, esp. from a ship by firing guns. signal-tower US = signal-box.
Derivatives:
signaller n.
Etymology: ME f. OF f. Rmc & med.L signale neut. of LL signalis f. L signum SIGN
2.
adj. remarkably good or bad; noteworthy (a signal victory).
Derivatives:
signally adv.
Etymology: F signaleacute f. It. past part. segnalato distinguished f. segnale SIGNAL(1)

Useful english dictionary. 2012.

Synonyms:

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