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signal(noun)/ˈsɪɡnəl/ /ˈsɪɡnəl/- a movement or sound that you make to give somebody information, instructions, a warning, etc.
SYNONYM sign
https://www.oxfordlearnersdictionaries.com/definition/english/sign_2 - a danger/warning/distress signal
- At an agreed signal they left the room.
- She made an impatient signal to him, but he ignored her.
- He thought he had heard the referee's signal to proceed.
- The siren was a signal for everyone to leave the building.
- We spotted the scout's signal that four enemy soldiers were coming towards us.
- Wait for the signal from the leader of your group.
- When I give the signal, run!
- All I get is a busy signal when I dial his number (= his phone is being used).
- hand signals (= movements that cyclists make with their hands to tell other people that they are going to stop, turn, etc.)
Extra Examples- At a pre-arranged signal, everyone started cheering.
- He had arranged a signal for the band to begin.
- She made a signal for the car to stop.
- The insect's yellow spots act as a warning signal to its predators.
- The brain interprets the signals from the retina as light.
- The nerves carry these signals to the brain.
- a piece of equipment that uses different coloured lights to tell drivers to go slower, stop, etc., used especially on railways and roads
- The traffic signals were on red.
- a stop signal
- Delays are occurring as a result of signal failure on the northbound line.
- a series of electrical waves that carry sounds, pictures or messages, for example to a radio, television or mobile phone
SEE ALSO time signal
https://www.oxfordlearnersdictionaries.com/definition/english/time-signal - radio signals
- TV signals
- a digital signal
- a high-frequency signal
- a radar signal
- to emit a signal
- to detect/pick up signals
- I couldn't get a signal on my phone.
- The signal is received by three different antennas at slightly different times.
- The satellite is used for transmitting signals around the world.
- The signal from the transmitter seems to have been boosted.
Extra Examples- It is possible to jam GPS signals in battle.
- The digital signal travels down wires to the server.
- The signal is scrambled into code before it is sent.
- This equipment can detect very low frequency signals.
- a faint signal from the satellite
- an event, an action, a fact, etc. that shows that something exists or is likely to happen
SYNONYM indication
https://www.oxfordlearnersdictionaries.com/definition/english/indication - The rise in inflation is a clear signal that the government's policies are not working.
- The court has given a strong signal that it disagrees with the government's position.
- Chest pains can be a warning signal of heart problems.
- Reducing prison sentences would send the wrong signals to criminals.
Extra Examples- Interviewers quickly learn to pick up non-verbal signals.
- The remark was interpreted as a signal that their government was ready to return to the peace talks.
- Try to read the signals coming from the patient.
- the signals that can indicate danger
Word Origin- noun 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.
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