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单词 signal
释义
signal
noun[C]
uk
/ˈsɪɡ.nəl/us
/ˈsɪɡ.nəl/

signalnoun[C](ACTION)

B2
anaction,movement, orsoundthat givesinformation, amessage, awarning, or anorder:
信号
When shegave(them) the signal, they allcheered.她发出信号后，他们都欢呼起来。
[+ that]Thefireworkswere a signalthatthefestivalhadstarted.焰火是节日开始的信号。
[+ to infinitive]Thepoliceofficergaveus the signaltostop.警察示意我们停下。
The signalforaracetostartis often thefiringof agun.赛跑常以发令枪响作为开始的信号。
US
(UKindicator)
aturn signal
（车辆）转向灯（同 turn signal）
picture of signal
sandsun/iStock/Getty Images Plus/GettyImages
More examples
  • At aprearrangedsignal, everyonestartedmovingforwards.
  • I usually set mywatchby thetimesignal on theradio.
  • At the given signal, thegrouprushedforwardto thebarrier.
  • I've beentryingtocallhim allevening, but Ikeepgetting theengagedsignal.
  • Awhistleis the signal for thechildrentolineupreadyto go into theclassroom.
SMART Vocabulary: related words and phrases
Signs, signals and symbols
  • beacon
  • breadcrumb
  • cryptanalyst
  • delimiter
  • digital badge
  • ideogram
  • indicator
  • lagging indicator
  • leading indicator
  • litmus test
  • logograph
  • marksomething/someoneoff
  • prompt
  • signboard
  • signifier
  • SOS
  • status symbol
  • the all-clear
  • torch
  • totem pole
See more results »

You can also find related words, phrases, and synonyms in the topics:

The exterior of vehicles

signalnoun[C](WAVE)

B2
aseriesofelectricalorradiowavesthat aresentto aradioortelevisioninordertoproduceasound,picture, ormessage
（用于传输声音、图像或其他信息的）电波信号
Examples
  • Thepicturequalityisbadbecause the TV signal isn'tpowerfulenough.
  • Theequipmentsentout aregularhigh-pitchedsignal.
  • There is someinterferenceon the signal - do notadjustyourset.
SMART Vocabulary: related words and phrases
Communications - general words
  • anti-satellite
  • app
  • autodial
  • autodialler
  • cable
  • cybernetics
  • fibre optics
  • hack
  • multipath
  • noise
  • non-computer
  • non-network
  • optical fibre
  • patch
  • patchsomeonethrough
  • pick
  • silent
  • trace
  • Zoombomber
  • Zoombombing
See more results »

signalnoun[C](SHOWING)

something thatshowsthat somethingelseexistsor islikelytohappen:
迹象
Thelossis aclearsignalofhisdeterioratingconfidence.比赛输了，这清楚地表明他信心日渐不足。
Thechangingcolourof theleaveson thetreesis a signalthatit willsoonbeautumn.树叶颜色的改变表明秋天即将来临。
SMART Vocabulary: related words and phrases
Signs, signals and symbols
  • beacon
  • breadcrumb
  • cryptanalyst
  • delimiter
  • digital badge
  • ideogram
  • indicator
  • lagging indicator
  • leading indicator
  • litmus test
  • logograph
  • marksomething/someoneoff
  • prompt
  • signboard
  • signifier
  • SOS
  • status symbol
  • the all-clear
  • torch
  • totem pole
See more results »

signalnoun[C](EQUIPMENT)

equipment,especiallyon thesideof arailwayorroad, often withlights, thattellsdriverstostop,continue, or go moreslowly:
（尤指铁路或公路上的）信号灯
arailwaysignal铁路信号灯
atrafficsignal交通信号灯
aroadsignal道路信号灯
SMART Vocabulary: related words and phrases
Railways & railway lines
  • Amtrak
  • artery
  • branch line
  • electrify
  • funicular
  • junction
  • level crossing
  • light rail
  • light railway
  • metro
  • monorail
  • railroad
  • railroad tie
  • RR
  • siding
  • signal box
  • switch
  • switchback
  • track
  • underground
See more results »

You can also find related words, phrases, and synonyms in the topics:

Roads: lights, signs & markings on roads
signal
verb
uk
/ˈsɪɡ.nəl/us
/ˈsɪɡ.nəl/
-ll-orUSusually-l-

signalverb(ACTION)

C2[IorT]
to make amovement,sound,flash, etc. that givesinformationortellspeoplewhat to do:
发信号；示意
Flashinglightson aparkedcarusually signal awarning(tootherdrivers).停着的车辆上闪烁的车灯通常是警告（其他驾车者）的信号。
He signalledleft, andturnedthelorryslowly.他打开左转方向灯，然后将卡车缓慢转过去。
He was signalling(= giving a signal)with aredflag.他正用红色旗子发信号。
She signalledforhelp.她发出了求救信号。
[+ that]She signalledtothecarsbehind herthatthey were going thewrongway.她示意后面的车辆走错了路。
[+ obj + to infinitive]The children'smothersignalled themtobequiet.孩子们的母亲示意他们安静。
[+ to infinitive]The children'smothersignalledto/forthemtobequiet.孩子们的母亲向他们示意保持安静。
More examples
  • She signalled to them tositdown.
  • Theshipsignalled forhelp.
  • Aflashinglightsignalled that there wasdangerahead.
  • I signalledleftandturnedinto thedriveway.
SMART Vocabulary: related words and phrases
Communicating & keeping in touch
  • backchannel
  • bell
  • call back
  • callsomeoneup
  • catchup
  • communication
  • communicative
  • communicator
  • drop
  • hear
  • liaison
  • mute
  • picksomeone/somethingup
  • pick up the phoneidiom
  • propagation
  • radio silence
  • rapporteur
  • reach out (tosomeone)
  • touch
  • transmit
See more results »

signalverb(SHOW)

[T]
to show that youintendor arereadyto do something:
表达，表示；显示
[+ that]Theunionhas signalledthattheworkerswillstrike.工会表示工人们将会罢工。
Theunionhas signalled theworkers'intentiontostrike.工会已表示工人们打算罢工。
Thedeathof Chairman Mao signalled(=marked)the end of anerainChinesehistory.毛主席的去世标志着中国历史上一个时代的结束。
SMART Vocabulary: related words and phrases
Signs, signals and symbols
  • beacon
  • breadcrumb
  • cryptanalyst
  • delimiter
  • digital badge
  • ideogram
  • indicator
  • lagging indicator
  • leading indicator
  • litmus test
  • logograph
  • marksomething/someoneoff
  • prompt
  • signboard
  • signifier
  • SOS
  • status symbol
  • the all-clear
  • torch
  • totem pole
See more results »
signal
adjective[before noun]
formal
uk
/ˈsɪɡ.nəl/us
/ˈsɪɡ.nəl/
noticeableandunusual:
显著的；不寻常的
a signalsuccess/failure重大胜利／失败
SMART Vocabulary: related words and phrases
Unique and unusual
  • accidental
  • alt-
  • alternative
  • be marked out assomethingidiom
  • be one of a kindidiom
  • guerrilla
  • incongruous
  • inimitable
  • irreplaceable
  • larger than lifeidiom
  • personalized
  • quaintly
  • quaintness
  • quirkiness
  • quirky
  • unique
  • uniquely
  • unmatchable
  • unmatched
  • unparalleled
See more results »
(Definition ofsignalfrom theCambridge Advanced Learner's Dictionary & Thesaurus© Cambridge University Press)

signal| American Dictionary

signal
noun[C]
us
/ˈsɪɡ·nəl/

signalnoun[C](ACTION)

anaction,movement, orsoundthat givesinformation, amessage, awarning, or anorder:
Itriedtocallbutkeptgetting abusysignal.
When thelieutenantgave the signal, fivepoliceofficerschargedinto theapartment.
Inretrospect,lookingat how she wasacting, we should have beenabletorecognizethedangersignals.
A signal is also adevice, often withlights, thatshowspeopleorvehicleswhether tostop, go, ormovecarefully.

signalnoun[C](WAVE)

aseriesofenergywavesthatcarryasound,picture, or otherinformation:
a low-frequencyradiosignal
signal
adjective
fml
us
/ˈsɪɡ·nəl/

signaladjective(IMPORTANT)

unusualandimportant:
Youperformeda signalservicetoourpeople, and wewishtoexpressourgratitude.
signal
verb[I/T]
us
/ˈsɪɡ·nəl/

signalverb[I/T](MAKE MOVEMENT)

to make amovement,sound, etc. that givesinformationortellspeoplewhat to do:
[I]When youlearntodrive, you are told that you have to signal before youturnrightorleft.
[T]Thepoliceofficersignaled us tostop.
(Definition ofsignalfrom theCambridge Academic Content Dictionary© Cambridge University Press)

signal| Business English

signal
noun[C]
uk
/ˈsɪɡnəl/us
asignthat something istrueor that something is going tohappen:
a signal to sbIt is a signal to therestof theworldthat we areseriousaboutglobalwarming.
aclear/strong/importantsignal
a signal of sthIt was astrongsignal of thepowernowwieldedbybiginstitutionalinvestors.
mixed/conflicting/contradictingsignals
theright/wrongsignal
apositivesignal
COMMUNICATIONS
aseriesofelectricalorradiowavesthat aresentto aradio,television, ormobilephoneinordertoproduceasound,picture, ormessage:
I couldn'tget a signalon myphone.
signal
verb[T]
uk
/ˈsɪɡnəl/us
UK-ll-|US-l-
to show that something is going tohappenor that you are going to do something:
Drops insalessignal atoughyearahead.
signal thatItrecentlysignalled that it would notstandin the way of atakeoverbid.
(Definition ofsignalfrom theCambridge Business English Dictionary© Cambridge University Press)

Examplesofsignal

signal
Where price signals are distorted we expect to see greater inefficiency and higher levels of pollution.
From theCambridge English Corpus
Lower inflation rates not only lead to clearer pricing signals and better investment decisions by economic agents, but also protect fixed income earners.
From theCambridge English Corpus
A genitive nominal, on the other hand, signals that the designated thing is not there as a participant of the event in question.
From theCambridge English Corpus
During morphogenesis.positional information is conveyed to neiboring cells by signaling molecules.
From theCambridge English Corpus
Biased attention to signals of threat or danger are thought to create cognitive distortions through a process of overactivation.
From theCambridge English Corpus
Thus, it is possible that right prefrontal asymmetry results in reduced inhibitory signals toward the amygdala, which would then maintain aversive-related responses.
From theCambridge English Corpus
The physiological context of signaling is mostly sidelined until the last two chapters, which are dedicated to signalling in development.
From theCambridge English Corpus
On the other hand, discrete emotional signals may convey different information and be processed distinctly.
From theCambridge English Corpus
The countdown task consisted of five trials with two separate conditions: signaled aversion and unsignaled aversion.
From theCambridge English Corpus
Since the frequency of the signals emitted by the baroreceptors is known, this can be done spectrally, if the coupling is linear.
From theCambridge English Corpus
The only temporal information that we are given by the linguistic signals is that, at the time referred to, the situation is in progress.
From theCambridge English Corpus
If this attempt at signalling works, it does so by means of salience (pp. 158-9).
From theCambridge English Corpus
If it is, then perhaps they emphasize noise because that might provide the prior signals on which modulatory processes operate.
From theCambridge English Corpus
One common view is that they increase the salience of relevant signals.
From theCambridge English Corpus
Hypothesis: progesterone primes breast cancer cells for cross-talk with proliferative or antiproliferative signals.
From theCambridge English Corpus
These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors.

Collocationswithsignal

signal

These are words often used in combination withsignal.

Click on a collocation to see more examples of it.

acoustic signal
Those variations in theacousticsignalthat do not contribute to differences in meaning are simply not perceived by the listener.
From theCambridge English Corpus
alarm signal
In treated colonies, but not controls, workers were excitable and most began head rapping, analarmsignal, if the colony was disturbed.
From theCambridge English Corpus
analogue signal
A sequence of measurements of ananaloguesignalrequires values both for time (horizontal axis) and for amplitude (vertical axis).
From theCambridge English Corpus
These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors.
#https://dictionary.cambridge.org//dictionary/english/signal##
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更新时间：2024/12/28 0:18:03