nounπShareA sequence of states representing an encoded message in a communication channel."The flashing red light was a signal that the school cafeteria was out of pizza. "signalcommunicationtechnologyelectronicsessentialChat with AIVocabulary GamePractice Reading
nounπShareAny variation of a quantity or change in an entity over time that conveys information upon detection."The flashing red light was a signal that the meeting was starting. "signalcommunicationelectronicstechnologyphysicsessentialChat with AIVocabulary GamePractice Reading
nounπShareA sign made to give notice of some occurrence, command, or danger, or to indicate the start of a concerted action."The flashing red light was a signal that the fire alarm had been triggered. "communicationsignalsignactiontechnologymilitarypoliceessentialChat with AIVocabulary GamePractice Reading
nounπShareAn on-off light, semaphore, or other device used to give an indication to another person."The traffic signal turned red, indicating it was time to stop. "signaldevicecommunicationtechnologyelectronicsessentialChat with AIVocabulary GamePractice Reading
nounπShare(of a radio, TV, telephone, internet, etc.) An electromagnetic action, normally a voltage that is a function of time, that conveys the information of the radio or TV program or of communication with another party."The radio signal was weak, making it difficult to hear the news report clearly. "technologyelectronicscommunicationsignalsoundmediainternetphysicstechnicalcomputingessentialChat with AIVocabulary GamePractice Reading
nounπShareAn action, change or process done to convey information and thus reduce uncertainty."The flashing lights were a signal that the school bus was approaching. "signalcommunicationtechnologyelectronicsinfosciencetechnicaldevicesystemessentialChat with AIVocabulary GamePractice Reading
nounπShareA token; an indication; a foreshadowing; a sign."The teacher's raised eyebrow was a signal that she wasn't happy with our answers. "signalsigncommunicationtechnologyelectronicsmediaessentialChat with AIVocabulary GamePractice Reading
nounπShareUseful information, as opposed to noise."The teacher's clear instructions were a useful signal, helping the students understand the math problem. "signaltechnologycommunicationelectronicsinfoessentialChat with AIVocabulary GamePractice Reading
nounπShareA simple interprocess communication used to notify a process or thread of an occurrence."The teacher sent a signal that class was starting. "computingcommunicationtechnologysignalprocesssystemessentialChat with AIVocabulary GamePractice Reading
nounπShareA signalling interaction between cells"The hormone released by the mother's body was a crucial signal to the baby that it was time to be born. "biologyphysiologybiochemistryessentialChat with AIVocabulary GamePractice Reading
verbπShareTo indicate; to convey or communicate by a signal."The teacher signaled for everyone to be quiet. "communicationtechnologysignalactionessentialChat with AIVocabulary GamePractice Reading
verbπShareTo communicate with (a person or system) by a signal."Seeing the flames, he ran to the control room and signalled headquarters."communicationtechnologysystemsignalessentialChat with AIVocabulary GamePractice Reading
adjectiveπShareStanding above others in rank, importance, or achievement."a signal exploit; a signal service; a signal act of benevolence"achievementvaluequalitypositionessentialChat with AIVocabulary GamePractice Reading