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IELTS BNC: 1960 COCA: 2078
signal
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noun [C] /ˈsɪɡn(ə)l/
singularsignal
pluralsignals
  1. 1
    a movement or sound made by someone that has a special meaning to another person 暗号；信号
    give (someone) a signal :

    We waited for them to give us the signal to move. 我们等着他们给我们发出前进的信号。

    signal to :

    He gave a signal to his driver to carry on. 他示意司机继续开车。

    at a signal :

    At the prearranged signal, we all jumped up and shouted ‘Surprise!' 在约定的暗号发出时，我们都跳了出来，大叫一声“惊喜！”

    do something as a signal (of something) :

    They waved a flag as a signal of distress. 他们摇旗表示求救。

    mixed/conflicting signals (=signals that have different meanings) 有歧义/自相矛盾的信息 :

    She knew she was sending him mixed signals. 她明白自己发给他的信息自相矛盾。

     Synonyms and related words
    General words for gestures and gesturing: action, body language, flourish...
     Synonyms and related words
    Communicative sounds: applause, a round of applause, a snap of the fingers...
    1. a.
      information sent from one thing or person to another using a piece of equipment or an organized system （传递的）信息

      sailors practising their semaphore signals 练习旗语的海员

       Synonyms and related words
      General words for information, news and facts: information, data, datum...
  2. 2
    a fact, event, or action that shows what someone intends to do or shows what is likely to happen 征兆；预兆
    signal of :

    They had ignored the strong signals of an approaching economic crisis . 他们忽视了即将到来的经济危机的强烈征兆。

    signal for/to :

    The election was a signal for the party to rethink its strategies. 这次选举对该党来说是一个需要重新考虑其策略的信号。

    give/send a signal :

    In terms of their personal relationships, teachers have to be very careful not to send students the wrong signals. 在个人关系方面，教师要特别谨慎，以免给学生发出错误的信号。

    read the signals (=understand their meaning correctly) 明白意思 :

    When she told him she was leaving, Bill wasn't surprised – he had read the signals. 她告诉比尔要走时，比尔并不感到吃惊，他早就明白她的意思。

     Synonyms and related words
    Signs of how things are or what may happen in the future: sign, signal, indication...
    Collocates: signal
    Adjectives frequently used with signal
    ▪  clear, important, powerful, strong, unmistakable
  3. 3
    pictures, sound, or other information sent by one piece of electronic equipment and received by another one （电子）信息，信号

    radio signals 无线电讯号

    carry a signal :

    The copper wire carries the electrical signals. 铜丝可以传递电讯信号。

     Synonyms and related words
    Telephones and telecommunication equipment: 3G, 4G, answering machine...
    Collocates: signal
    Verbs frequently used with signal as the object
    ▪  carry, emit, generate, give, produce, send (out), transmit
  4. 4
    a piece of equipment with coloured lights on it that tells the driver of a vehicle to stop, go, or slow down 交通信号灯；红绿灯

    The signal was at green. 当时是绿灯亮着。

     Synonyms and related words
    Road and traffic signals and crossings: advanced green, Belisha beacon, box junction...
signal
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verb /ˈsɪɡn(ə)l/
present tense
I/you/we/theysignal
he/she/itsignals
present participlesignalling
past tensesignalled
past participlesignalled
  1. 1
    [I/T] to make a movement or sound that has a special meaning to another person 发信号；打信号；用信号示意

    The cyclist signalled and turned right. 骑车者发出信号后向右转。

    signal to someone :

    He signalled frantically across the room to his wife. 他冲着屋子对面的妻子猛打手势。

    signal (to) someone to do something :

    The driver signalled her to cross the road. 司机示意让她过马路。

    signal that :

    He flashed his torch to signal that he was ready. 他闪了闪手电筒，示意他准备好了。

     Synonyms and related words
    General words for gestures and gesturing: action, body language, flourish...
  2. 2
    [T] to show that something is happening or will happen 表明；标志着

    This agreement signalled the end of the war. 这项协议标志着战争的结束。

    signal that :

    The new tax signalled that the government was serious about the environment. 这项新税收表明政府对环境问题是认真的。

     Synonyms and related words
    To be a sign or symbol of something: signify, stand for, symbolize...
  3. 3
    [T] if you signal a quality or your feelings, you show what you intend to do about something 告知；表示

    The kidnappers have signalled their willingness to negotiate. 绑匪已经表示愿意谈判。

    Both parties have signalled their determination to win. 两党都已表示出要赢的决心。

     Synonyms and related words
    To show or express emotions: show, display, manifest...
signal
adjective very formal /ˈsɪɡn(ə)l/
  1. especially important and noticeable 极重要的；显著的；非凡的

    a signal honour 莫大的荣誉

     Synonyms and related words
    Important: important, major, key...
     Synonyms and related words
    Obvious: obvious, clear, significant...
IELTS BNC: 1960 COCA: 2078
signal

noun¹

 1sign/action/sound that sends a message標誌；動作；聲音ADJECTIVE | VERB + SIGNAL | SIGNAL + VERB | PREPOSITION ADJECTIVE➤clear, unmistakable清晰的／明確無誤的信號▸➤agreed, prearranged約好的／事先約定的信號▸➤conflicting, confusing, contradictory, mixed相互衝突的信號；讓人迷惑不解的信號；有歧義的信號▸➤wrong錯誤信號◇Laughing when you should be crying sends out the wrong signals to people.應該哭的時候卻笑，就向人們傳達了錯誤的信號。➤alarm, danger, distress, warning報警／危險／求救／警告信號▸➤hand, non-verbal, smoke, visual手勢；非語言信號；煙霧信號；視覺信號▸➤turn (NAmE) （汽車上的）轉向指示燈▸➤busy (NAmE) (engaged tone in BrE) （電話佔線時的）忙音◇All I get is a busy signal when I dial his number.我給他撥電話只能聽到佔線的忙音信號。➤buy, sell (both business商業) 買入／賣出信號◇A strong buy signal was issued to traders.交易員收到了強烈的買入信號。VERB + SIGNAL➤give (sb), make, send, send out（給某人）發信號；打信號◇When I give the signal, run!我一發信號，你就跑！➤interpret, read解讀信號◇The brain interprets the signals from the retina as light.大腦把來自視網膜的信號解讀為光。➤interpret sth as把⋯理解為信號◇The remark was interpreted as a signal that their government was ready to return to the peace talks.該言論被視作政府準備重回和平談判的信號。➤pick up, respond to領會信號；對信號作出反應◇Interviewers quickly learn to pick up non-verbal signals.採訪者很快學會讀懂非語言信號。➤act as作為信號◇The insect's yellow spots act as a warning signal to its predators.昆蟲身上的黃點是向其天敵發出的警告信號。SIGNAL + VERB➤come from sth信號來自⋯◇Try to read the signals coming from the patient.要盡量讀懂病人發出的信號。➤indicate sth信號表示⋯◇the signals that can indicate danger可能預示危險的信號PREPOSITION➤at a signal, on a signal按照信號◇At a prearranged signal, everyone started cheering.看到預先約好的信號，大家都開始歡呼起來。➤signal for示意⋯的信號◇She made a signal for the car to stop.她打了個手勢，讓汽車停下了。➤signal from, signal to來自⋯的／給⋯的信號◇Wait for the signal from the leader of your group.等你們組的組長發出信號。
signal

noun²

 2set of lights for drivers交通信號燈ADJECTIVE | VERB + SIGNAL | SIGNAL + VERB | SIGNAL + NOUN ADJECTIVE➤railroad, railway, traffic鐵路信號燈；交通信號燈VERB + SIGNAL➤operate操作信號燈SIGNAL + VERB➤be on red/green, be red/green紅燈亮；綠燈亮◇The traffic signals were on red.交通信號亮着紅燈。➤fail信號燈失靈SIGNAL + NOUN➤box (BrE) （鐵路上的）信號樓▸➤failure (BrE) 信號燈故障
signal

noun³

 3series of radio waves, chemical messages, etc.無線電波；化學信息ADJECTIVE | VERB + SIGNAL | SIGNAL + VERB | SIGNAL + NOUN | PREPOSITION ADJECTIVE➤faint, weak微弱的信號▸➤strong強信號▸➤high-frequency, low-frequency高頻／低頻信號➤input, output輸入／輸出信號▸➤acoustic, analogue/analog, audio, chemical, digital, electrical, electronic, GPS, light, radar, radio, satellite, sonar, sound, television, TV, video, wireless聲學信號；模擬信號；音頻信號；化學信號；數字信號；電信號；電子信號；全球定位系統信號；光信號；雷達信號；無線電信號；衞星信號；聲納信號；音頻信號；電視信號；視頻信號；無線信號VERB + SIGNAL➤carry, pass, relay傳送／傳遞／中繼轉發信號◇The nerves carry these signals to the brain.神經把這些信號傳給大腦。➤amplify, boost放大／增強信號▸➤convert (sth into), scramble（把⋯）轉換成信號；對信號作擾碼處理◇The signal is scrambled into code before it is sent.發送信號之前要先擾碼，把它變成密碼。➤decode, encode解碼信號；把信號編碼▸➤emit, generate, produce, send, transmit發射信號；發出信號；發送信號▸➤detect, pick up, receive, respond to探測信號；接收信號；對信號作出回應◇This equipment can detect very low-frequency signals.這種設備能夠探測甚低頻信號。➤block, jam攔截／干擾信號◇It is possible to jam GPS signals in battle.在作戰時對全球定位系統的信號進行干擾是可能的。SIGNAL + VERB➤travel信號傳播◇The digital signal travels down wires to the server.數字信號沿着線路傳到服務器。◇A light signal can travel well over 16 km before it halves in intensity.光信號傳播 16 公里以上強度才會減半。➤fade信號漸弱SIGNAL + NOUN➤intensity, strength信號強度PREPOSITION➤signal from來自⋯的信號◇a faint signal from the satellite衞星發出的微弱信號➤signal to向⋯發出的信號
signal

verb¹

 1move your arms to give a signal打手勢ADVERB | PREPOSITION ADVERB➤frantically瘋狂打手勢◇I saw her signal frantically to us.我看見她瘋了似的朝我們打手勢。PREPOSITION➤for示意⋯◇He raised his hand to signal for the waiter.他舉起手向侍者示意。➤to向⋯打手勢◇She tried to signal to the bus driver to stop.她試圖打手勢讓公共汽車司機停車。
signal

verb²

 2show/mark sth表明ADVERB | VERB + SIGNAL ADVERB➤clearly清楚地標誌◇These changes clearly signal the end of the welfare state as we know it.這些變化清楚地標誌着我們熟悉的福利國家的終結。➤effectively (especially BrE) 實際上表明◇A change of mind effectively signals a change in overall policy.改變主意實際上意味着整個政策有所改變。➤not necessarily不一定預示◇A fall in demand does not necessarily signal the death of the industry.需求的減少並不一定意味着該行業走向窮途末路。VERB + SIGNAL➤appear to, seem to似乎／好像預示◇These events appeared to signal the end of an era.這些事件似乎預示着一個時代的結束。➤try to試圖表明➤be intended to, be meant to旨在／意欲表明◇This address was meant to signal a change in policy.這個講話意欲表明政策將有所改變。
IELTS BNC: 1960 COCA: 2078
signal verb
⇨ mean 1 (signal a change in policy) ⇨ nod (Don't fire until I signal.)signal noun
⇨ signal (give sb a signal) ⇨ sign 1 (a clear signal that sth is wrong)signal

noun

signal ♦︎ sign ♦︎ cueThese are all words for a movement, sound or event that gives sb information or tells sb to do sth. 这些词均表示信号、暗号。PATTERNS AND COLLOCATIONS 句型和搭配◆a signal / sign / cue for sb / sth◆a signal / sign / cue (for sb) to do sth◆a clear signal / sign / cue◆a warning signal / sign◆to wait for / miss a / your signal / sign / cue◆to understand / misunderstand a / sb's signal / sign◆to give sb a signal / sign / cue◆to make a signal / sign■ signal [countable] a movement or sound that you make to give sb information, instructions, a warning, etc. 示意的动作（或声音）；信号；暗号◆a danger / distress signal危险／求救信号◆At an agreed signal they left the room.收到约定的信号后，他们离开了房间。◆The siren was a signal for everyone to leave the building.警报声就是要所有人都离开大楼的信号。◆When I give the signal, run!我一发信号，你们就跑！◆ (NAmE) 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。  see also signal ⇨ nod verb ■ sign [countable] a movement or sound that you make to tell sb sth 示意的动作（或声音）；手势◆He gave a thumbs-up sign.他竖起大拇指表示赞同。◆She nodded as a sign for us to sit down.她点头示意我们坐下。NOTE 辨析 Signal or sign?A sign is usually a hand movement, and is often fairly fixed and likely to be understood by people in general; signal has a wider range, and may have been invented by individuals in a particular situation. * sign通常指一种手势，而且常常是比较固定的，人们一般都能够理解；signal的范围更广泛些，可能是个人在特定情况下发明出来的◆sign language (= a system of communicating with people by using hand movements rather than spoken words) 手势语◆a V-sign (= a sign that you make by holding up your hand and making a V-shape with your first and second fingers) V字形手势◆We agreed on a signal to mean 'stop'.我们约定了一种表示“停止”的信号。 ■ cue [countable] an action or event that is a signal for sb to do sth 暗示；提示；信号◆Jon's arrival was a cue for more champagne.乔恩的到来意味着要喝更多的香槟酒。◆I think that's my cue to explain why I'm here.我想这是要我解释为什么到这里来。◆ (figurative) 'Where is that boy?' As if on cue, Simon appeared in the doorway (= as if sb had given him a signal).“那男孩在哪里？”这话一出，西蒙像接到了信号一样出现在门口。◆ (figurative) Investors are taking their cue from the big banks and selling dollars (= taking what other people do as a sign for them to do the same).投资者看到大银行抛售美元，纷纷效法。

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