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signal
5 ENTRIES FOUND:
plural signals
plural signals
Learner's definition of SIGNAL
[count]
1
: an event or act which shows that something exists or that gives information about something : sign信号（事件或行为） — often + of
- The change in his behavior is clearly a signal [=indication] that there is a problem.他行为的改变清楚地表明存在问题。
- He likes her but he is sending the wrong signals with his constant teasing.他喜欢她，可是他不断的戏弄给了她错误的信号。
- Inflammation is a signal of infection.发炎是感染的信号。
2
: something (such as a sound, a movement of part of the body, or an object) that gives information about something or that tells someone to do something信号，暗号（声音、身体动作或某物体等）
- Don't start until I give the signal. [=sign]等我发出信号再开始。
- The teacher gave us the signal to finish what we were working on and hand in our tests.老师示意我们结束做题，上交试卷。
- The pilot sent out a distress signal [=a message that the airplane was in danger] before the plane crashed.飞行员在飞机坠毁前发出了求救信号。
- They communicated with each other by using hand signals. [=movements of a person's hands that mean something]他们彼此用手势交流。
3
: a piece of equipment with colored lights that is used on railways and roads to tell people when to go, to slow down, or to stop交通信号灯；红绿灯
- Faulty wiring in the train station caused a signal to malfunction.火车站的线路故障导致了信号灯失灵。
- The traffic signal [=traffic light] was not working.交通信号灯坏了。
4
technical
a : a message, sound, or image that is carried by waves of light or sound（传播信息、声音、图像等的光波或声波的）信号
- The video/TV signal is scrambled.视频/电视信息被扰频。
- Satellite dishes receive television signals.卫星电视的碟形天线接收电视信号。
- a digital signal数字信号
- The transmitter beams radio signals into space.发射机向太空发射无线电信号。
b : a wave of light or sound that carries a message, sound, or image（传播信息、声音或图像的）光波，声波
- We'll need better equipment to generate a 50 Hz signal.为产生50赫兹的声波，我们需要更好的设备。
2 signal /ˈsɪgnl̟/ verb
signals US signaled or British signalled US signaling or British signalling
2 signal
/ˈsɪgnl̟/
verb
signals US signaled or British signalled US signaling or British signalling
Learner's definition of SIGNAL
1
[+ object] : to be a sign of (something) : to show the existence of (something)标志；表明
- Robins signal the arrival of spring.知更鸟是春天到来的标志。
- The election results surely signal the start/beginning of a new era.选举结果无疑标志着一个新纪元的开始。
- He signaled [=showed, communicated] his irritation by sighing and rolling his eyes dramatically.他夸张地叹息、翻白眼，以示自己非常恼怒。
- Redness, swelling, and painful itching signal [=indicate] an infection.发红、肿胀、又疼又痒说明有感染。
- A lock on the suitcase might signal that there's something of value inside.手提箱上的锁表明里面可能有贵重物品。
2
: to make a sound or motion that tells someone something发信号；示意
[no object]
- Did he signal before he made the left turn?他左转之前开转向灯了吗？
- They signaled at me to come over to their table.他们示意我去他们那桌。
- We signaled for help.我们发出了求救信号。
[+ object]
- He signaled us that it was time to begin the meeting.他示意我们是时候开始会议了。
- The umpire signaled a strike.裁判用手势示意这一球为好球。
3 signal /ˈsɪgnl̟/ adjective
3 signal
/ˈsɪgnl̟/
adjective
Learner's definition of SIGNAL
always used before a noun formal
: very important or great : significant重大的；显要的
- Is he worthy of such a signal honor?他够格获得如此大的荣誉吗？
- The bill's passage was a signal [=notable] victory for environmentalists.这项法案的通过是环境保护者的一个重大胜利。
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