signal (EN)

noun, verb, adjective

noun “signal”

1. a way of communicating information, instructions, or warnings through movements or sounds
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   The firefighter used a whistle as a signal for everyone to evacuate the building immediately.
2. the electromagnetic action used by radios, TVs, telephones, and the internet to convey information or communication
   The TV stopped working because it lost the signal during the storm.
3. a device like a light or semaphore used to show something to someone
   The traffic signal turned green, indicating it was safe to proceed.
4. a sign or indication of something, often hinting at future events
   The dark clouds in the sky were a signal that a storm was approaching.
5. information that is useful and distinct from irrelevant or unrelated data
   As data scientists, we try to distinguish the signal from the noise in complex data.

verb “signal”

1. to indicate something to someone using a signal
   She signaled for help by waving her arms frantically.
2. to indicate the existence or likelihood of something happening
   The dark clouds signalled that a storm was approaching.
3. to use lights or an arm movement to show that a vehicle will turn or change direction
   He signaled left before merging into the other lane.

adjective “signal”

1. describing something or someone as outstanding in terms of rank, importance, or achievement
   Her signal victory in the science competition earned her a scholarship to a prestigious university.