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IELTS BNC: 1960 COCA: 2078

signal

noun
 
/ˈsɪɡnəl/
/ˈsɪɡnəl/
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  1.  
     a movement or sound that you make to give somebody information, instructions, a warning, etc.信号；暗号 synonym sign
    • a danger/warning/distress signal危险/警告/遇险信号
    • at a signal At an agreed signal they left the room.收到约定的信号后，他们离开了房间。
    • signal to somebody She made an impatient signal to him, but he ignored her.她向他做了一个不耐烦的手势，但他不理她。
    • signal to do something He thought he had heard the referee's signal to proceed.他认为他听到了裁判发出的继续进行的信号。
    • signal for somebody to do something The siren was a signal for everyone to leave the building.警报器一响，就是要所有人离开大楼。
    • signal (that)… We spotted the scout's signal that four enemy soldiers were coming towards us.我们发现了侦察兵的信号，四名敌军正向我们走来。
    • signal from somebody Wait for the signal from the leader of your group.等你们组的组长发出信号。
    • When I give the signal, run!我一发信号，你就跑！
    • (North American English) All I get is a busy signal when I dial his number (= his phone is being used).我什么时候拨他的电话听到的都是忙音。
    • hand signals (= movements that cyclists make with their hands to tell other people that they are going to stop, turn, etc.)（骑车人和驾车人的）示意手势
    see also smoke signal, turn signal
    Extra Examples
    • At a pre-arranged signal, everyone started cheering.按照预先约好的信号，大家都开始欢呼起来。
    • He had arranged a signal for the band to begin.他约定了乐队开始演奏的信号。
    • She made a signal for the car to stop.她打了个手势，让汽车停下了。
    • The insect's yellow spots act as a warning signal to its predators.昆虫身上的黄点是向其天敌发出的警告信号。
    • The brain interprets the signals from the retina as light.大脑把来自视网膜的信号解读为光。
    • The nerves carry these signals to the brain.神经把这些信号传给大脑。
    Oxford Collocations Dictionaryadjective
    • clear
    • unmistakable
    • agreed
    • …
    verb + signal
    • give (somebody)
    • make
    • send
    • …
    signal + verb
    • come from something
    • indicate something
    preposition
    • at a signal
    • on a signal
    • signal for
    • …
    See full entry
  2.  
     a piece of equipment that uses different coloured lights to tell drivers to go slower, stop, etc., used especially on railways and roads（尤指铁路和公路上的）指示灯，信号灯，红绿灯
    • The traffic signals were on red.交通信号亮着红灯。
    • a stop signal停车信号
    • Delays are occurring as a result of signal failure on the northbound line.由于北行线路信号故障，延误正在发生。
    Topics Transport by car or lorryb1
    Oxford Collocations Dictionaryadjective
    • railroad
    • railway
    • traffic
    • …
    verb + signal
    • operate
    signal + verb
    • be on red/​green
    • be red/​green
    • fail
    • …
    signal + noun
    • box
    • failure
    See full entry
  3.  
     a series of electrical waves that carry sounds, pictures or messages, for example to a radio, television or mobile phone（传输声音、图像或其他信息的电波）信号
    • radio signals无线电讯号
    • TV signals电视信号
    • a digital signal数字信号
    • a high-frequency signal高频信号
    • a radar signal雷达信号
    • to emit a signal发射信号
    • to detect/pick up signals探测到／收到信号
    • I couldn't get a signal on my phone.我的手机收不到信号。
    • The signal is received by three different antennas at slightly different times.信号由三个不同的天线在稍微不同的时间接收。
    • The satellite is used for transmitting signals around the world.这颗卫星用于向世界各地传送信号。
    • signal from something The signal from the transmitter seems to have been boosted.发射机发出的信号似乎增强了。
    see also time signal
    Extra Examples
    • It is possible to jam GPS signals in battle.在作战时对全球定位系统的信号进行干扰是可能的。
    • The digital signal travels down wires to the server.数字信号沿着线路传到服务器。
    • The signal is scrambled into code before it is sent.发送信号之前要先扰码，把它变成密码。
    • This equipment can detect very low frequency signals.这种设备能够探测甚低频信号。
    • a faint signal from the satellite卫星发出的微弱信号
    Topics TV, radio and newsb2
    Oxford Collocations Dictionaryadjective
    • faint
    • weak
    • strong
    • …
    verb + signal
    • carry
    • pass
    • relay
    • …
    signal + verb
    • travel
    • fade
    signal + noun
    • intensity
    • strength
    preposition
    • signal from
    • signal to
    See full entry
  4.  
     an event, an action, a fact, etc. that shows that something exists or is likely to happen标志；预示；信号 synonym indication
    • signal (that)… The rise in inflation is a clear signal that the government's policies are not working.通货膨胀率的上升清楚地表明，政府的政策不起作用。
    • The court has given a strong signal that it disagrees with the government's position.法院发出了强烈的信号，表明它不同意政府的立场。
    • signal of something Chest pains can be a warning signal of heart problems.胸部疼痛可能是心脏病的先兆。
    • Reducing prison sentences would send the wrong signals to criminals.减刑会向犯罪分子发出错误的信号。
    Synonyms signsign
    • indication
    • symptom
    • symbol
    • indicator
    • signal
    These are all words for an event, an action or a fact that shows that something exists, is happening or may happen in the future.
    • sign an event, an action or a fact that shows that something exists, is happening or may happen in the future:
      • Headaches may be a sign of stress.头痛可能是紧张的迹象。
    • indication (rather formal) a remark or sign that shows that something is happening or what somebody is thinking or feeling:指标示、象征：
      • They gave no indication as to how the work should be done.他们根本没说明这项工作该怎样做。
    sign or indication?用 sign 还是 indication？An indication often comes in the form of something that somebody says; a sign is usually something that happens or something that somebody does.
    • symptom a change in your body or mind that shows that you are not healthy; a sign that something exists, especially something bad:
      • Symptoms include a sore throat.症状包括嗓子疼。
      • The rise in inflation was just one symptom of the poor state of the economy.通胀上升不过是经济不景气的一个征候。
    • symbol a person, an object or an event that represents a more general quality or situation:
      • The dove is a universal symbol of peace.鸽子普遍象征着和平。
    • indicator (rather formal) a sign that shows you what something is like or how a situation is changing:指指示信号、标志、迹象：
      • the economic indicators经济指标
    • signal an event, an action or a fact that shows that something exists, is happening or may happen in the future:
      • Chest pains can be a warning signal of heart problems.胸部疼痛可能是心脏病的报警信号。
    sign or signal?用 sign 还是 signal？Signal is often used to talk about an event, action or fact that suggests to somebody that they should do something. Sign is not usually used in this way: Reducing prison sentences would send the wrong signs to criminals. Patterns
    • a(n) sign/​indication/​symptom/​symbol/​indicator/​signal of something
    • a(n) sign/​indication/​symptom/​indicator/​signal that…
    • a clear sign/​indication/​symptom/​symbol/​indicator/​signal
    • an obvious sign/​indication/​symptom/​symbol/​indicator
    • an early sign/​indication/​symptom/​indicator/​signal
    • an outward sign/​indication/​symbol
    • to give a(n) sign/​indication/​signal
    Extra Examples
    • Interviewers quickly learn to pick up non-verbal signals.采访者很快学会读懂非语言信号。
    • The remark was interpreted as a signal that their government was ready to return to the peace talks.该言论被视作政府准备重回和平谈判的信号。
    • Try to read the signals coming from the patient.要尽量读懂病人发出的信号。
    • the signals that can indicate danger可能预示危险的信号
    Oxford Collocations Dictionaryadjective
    • clear
    • unmistakable
    • agreed
    • …
    verb + signal
    • give (somebody)
    • make
    • send
    • …
    signal + verb
    • come from something
    • indicate something
    preposition
    • at a signal
    • on a signal
    • signal for
    • …
    See full entry
    5. Word Originnoun late Middle English: from Old French, from medieval Latin signale, neuter of late Latin signalis, from Latin signum ‘mark, token’. The verb dates from the early 19th cent.

signal

verb
 
/ˈsɪɡnəl/
/ˈsɪɡnəl/
Verb Forms
present simple I / you / we / they signal
/ˈsɪɡnəl/
/ˈsɪɡnəl/
he / she / it signals
/ˈsɪɡnəlz/
/ˈsɪɡnəlz/
past simple signalled
/ˈsɪɡnəld/
/ˈsɪɡnəld/
past participle signalled
/ˈsɪɡnəld/
/ˈsɪɡnəld/
(US English) past simple signaled
/ˈsɪɡnəld/
/ˈsɪɡnəld/
(US English) past participle signaled
/ˈsɪɡnəld/
/ˈsɪɡnəld/
-ing form signalling
/ˈsɪɡnəlɪŋ/
/ˈsɪɡnəlɪŋ/
(US English) -ing form signaling
/ˈsɪɡnəlɪŋ/
/ˈsɪɡnəlɪŋ/
jump to other results
  1.  
     [intransitive, transitive] to make a movement or sound to give somebody a message, an order, etc.发信号；发暗号；示意
    • Don't fire until I signal.等我发出信号后再开枪。
    • signal to somebody She signalled to the man, who immediately came over to her.她向那个男人打了个手势，那个男人立即向她走过来。
    • signal for something A woman was leaning out a top-floor window, signaling for help.一个女人从顶楼的窗户探出头来，示意救命。
    • signal to somebody for something He signalled to the waiter for the bill.他示意服务员结账。
    • signal to/for somebody to do something He signalled to us to join him.他示意要我们去他那儿。
    • The patrolman signalled for her to stop.巡警示意她停下来。
    • signal somebody to do something She signalled him to follow.她示意他跟她走。
    • signal something The referee signalled a foul.裁判鸣哨示意犯规。
    • signal (that)… She signalled (that) it was time to leave.她示意该走了。
    • signal which, what, etc… You must signal which way you are going to turn.你要朝哪个方向转，必须发出信号。
    Extra Examples
    • I saw her signal frantically to us.我看见她疯了似的朝我们打手势。
    • Many animals use their tails to signal.许多动物用尾巴发信号。
    • When I'm ready I'll signal with a flashlight.当我准备好的时候，我会用手电筒发信号。
    Oxford Collocations Dictionaryadverb
    • frantically
    preposition
    • for
    • to
    See full entry
  2. [intransitive, transitive] to show that your vehicle is going to change direction, by using lights or your arm信号；暗号 synonym indicate (8)
    • Did you signal before you turned right?右转弯前你示意了吗？
    • signal something to signal left/right向左边/右边发信号
    • signal (that)… I signalled that I was going to turn left.我示意我要左转。
  3. [transitive] signal something to be a sign that something exists or is likely to happen标志；表明；预示 synonym indicate
    • This announcement signalled a clear change of policy.这个声明显示政策有明显的改变。
    • The scandal surely signals the end of his political career.毫无疑问，这桩丑闻预示他的政治生涯就此结束。
    • These events appeared to signal the end of an era.这些事件似乎预示着一个时代的结束。
    • These changes clearly signal the end of the welfare state as we know it.这些变化清楚地标志着我们熟悉的福利国家的终结。
    • A fall in demand does not necessarily signal the death of the industry.需求的减少并不一定意味着该行业走向穷途末路。
    Oxford Collocations Dictionaryadverb
    • clearly
    • effectively
    • not necessarily
    • …
    verb + signal
    • appear to
    • seem to
    • try to
    • …
    See full entry
  4. [transitive] to do something to make your feelings or opinions known表达；表示；显示
    • signal something He signalled his discontent by refusing to vote.他拒绝投票以示不满。
    • signal (that)… She has signalled (that) she is willing to stand as a candidate.她表示愿意作为候选人参加竞选。
    Topics Opinion and argumentc2
    More Like This Consonant-doubling verbsConsonant-doubling verbs
    5. Word Originverb late Middle English: from Old French, from medieval Latin signale, neuter of late Latin signalis, from Latin signum ‘mark, token’. The verb dates from the early 19th cent.

signal

adjective
/ˈsɪɡnəl/
/ˈsɪɡnəl/
[only before noun] (formal)
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  1. important, clear and definite重大的；显要的
    • a signal honour极大的荣誉
    • a signal failure of leadership领导层的明显失败
    Word Originadjective early 17th cent.: from French signalé, from the Italian past participle segnalato ‘distinguished, made illustrious’, from segnale ‘a signal’.

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