signal

名词 n. 动词 v. 形容词 adj.
中文释义
发音 sĭgʹnəl

英文释义

名词 n.
  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.
  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.; A railway signal.
  6. An electromagnetic action, normally a voltage that is a function of time, that conveys the information of the radio or TV program or of communication with another party. Internet,TV,usually
    — My mobile phone can't get a signal in the railway station.
  7. An action, change or process done to convey information and thus reduce uncertainty.
  8. A token; an indication; a foreshadowing; a sign.
    — The weary sun […] / Gives signal of a goodly day to-morrow.
  9. Useful information, as opposed to noise.
  10. A simple interprocess communication used to notify a process or thread of an occurrence. Unix
  11. A signalling interaction between cells
动词 v.
  1. To indicate; to convey or communicate by a signal. ambitransitive
    — I signalled my acquiescence with a nod.
  2. To communicate with (a person or system) by a signal. transitive
    — Seeing the flames, he ran to the control room and signalled headquarters.
形容词 adj.
  1. Standing above others in rank, importance, or achievement. not-comparable
    — a signal exploit; a signal success; a signal act of benevolence

词形变化

signals plural signall alternative signals present,singular,third-person signaling US,participle,present signalling UK,participle,present signaled US,participle,past signaled US,past signalled UK,participle,past signalled UK,past signall alternative signall alternative

词汇关系

反义词
noise
衍生词
countersignal foresignal hand-signal immunosignal missignal oversignal phosphosignal resignal signalise signalize signaller undersignal unsignaled unsignalled
相关词
signature signet tocsin

词源

词源 1
From Old French segnal, seignal or Medieval Latin signāle; noun use of the neuter of Late Latin signālis, from Latin signum; verb use from 1805, as a shortened from signalize (1650s). Doublet of signum and sign.
词源 2
From Old French segnal, seignal or Medieval Latin signāle; noun use of the neuter of Late Latin signālis, from Latin signum; verb use from 1805, as a shortened from signalize (1650s). Doublet of signum and sign.
词源 3
From Old French segnal, seignal or Medieval Latin signāle; noun use of the neuter of Late Latin signālis, from Latin signum; verb use from 1805, as a shortened from signalize (1650s). Doublet of signum and sign.
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