| 单词 | signal |
| 释义 | 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 signal{eacute} f. It. past part. segnalato distinguished f. segnale SIGNAL(1) |
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