Signal
Privacy-focused messaging app
A signal is something that conveys information or triggers action—a gesture, sound, light, or other indicator meant to communicate.
Traffic signals control flow; a signal flare calls for help.
To signal is to send such a message: She signaled the waiter.
Signal also works as an adjective meaning notable or conspicuous: a signal achievement.
In technical contexts, a signal is an electrical impulse or wave carrying data.
Transmitted communication
- transmissionSending of information
- broadcastTransmitted media signal
- alertWarning or watchfulness
- notificationFormal notice given
cue · indication · warning · beacon · gesture · semaphore · morse code · flag
Rate of recurrence
- wavelengthSpatial repetition interval
- amplitudeMaximum oscillation displacement
- modulationVarying signals to transmit
- antennaBroadcast signal receiver
receiver · transmitter · bandwidth · interference · noise · analog · digital · carrier
Intersection flow controller
- intersectionPoint where paths meet
- crossingPoint where paths intersect
- pedestrianOne traveling afoot
- red lightTraffic control meaning halt
green light · yellow · semaphore · railroad · flashing · turn · arrow · walk
Brief head tilt
- waveOscillating motion through medium
- winkBrief one-eyed closure
- thumbs upGesture signaling approval
- handshakeMutual palm-gripping gesture
beckon · motion · eye contact · salute · bow · head tilt · finger point · shrug
message
Transmitted communication
- transmissionSending of information
- broadcastTransmitted media signal
- alertWarning or watchfulness
notification · cue · indication · warning · beacon · gesture · semaphore · morse code · flag · flare
frequency
Rate of recurrence
- wavelengthSpatial repetition interval
- amplitudeMaximum oscillation displacement
- modulationVarying signals to transmit
antenna · receiver · transmitter · bandwidth · interference · noise · analog · digital · carrier · oscillation
stoplight
Intersection flow controller
- intersectionPoint where paths meet
- crossingPoint where paths intersect
- pedestrianOne traveling afoot
red light · green light · yellow · semaphore · railroad · flashing · turn · arrow · walk · wait
nod
Brief head tilt
handshake · beckon · motion · eye contact · salute · bow · head tilt · finger point · shrug · acknowledgment
neurotransmitter
Synaptic chemical messenger
pathway · cascade · synapse · stimulus · response · chemical · electrical · impulse · nerve · brain
omen
Prophetic indicator
clue · symptom · marker · evidence · telltale · precursor · foreshadowing · augury · presage · warning
- digital communicationemail, internet, chat, texting, messaging
- messagingmessage, text, chat, send, reply
- messaging methodstext messaging, SMS, email, instant messaging, WhatsApp
- secure messagingWhatsApp, Telegram, encryption, end-to-end encryption, E2E
- encryptionencryption, encryption key, cryptography, end-to-end encryption, cipher
Signalnoise
Unwanted auditory disturbance
static · interference · white noise · distortion · background noise
Signalsilence
Total lack of sound
concealment · suppression · obfuscation · withholding · secrecy
- sign upFormally agree to participate
- stop signRoadside traffic directive
- sign inAuthenticate to access
- warning signsIndicators of impending danger
- peace signGesture symbolizing nonviolence
- signing upFormally agreeing to join
sign, signs, signed, signing, signer, signers, signals, signaled, signaling