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a movement or sound that you make to give somebody information, instructions, a warning, etc. 信号；暗号 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
Extra ExamplesAt 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
- …
- give (somebody)
- make
- send
- …
- come from something
- indicate something
- at a signal
- on a signal
- signal for
- …
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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。
Oxford Collocations Dictionaryadjective- railroad
- railway
- traffic
- …
- operate
- be on red/green
- be red/green
- fail
- …
- box
- failure
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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。
Extra ExamplesTopics TV, radio and newsb2It 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
Oxford Collocations Dictionaryadjective- faint
- weak
- strong
- …
- carry
- pass
- relay
- …
- travel
- fade
- intensity
- strength
- signal from
- signal to
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an event, an action, a fact, etc. that shows that something exists or is likely to happen 标志；预示；信号 - 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
- 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？ - 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？ - 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 ExamplesInterviewers 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
- …
- give (somebody)
- make
- send
- …
- come from something
- indicate something
- at a signal
- on a signal
- signal for
- …
- signal (that)…
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.