Communicated or indicated something through signs, gestures, or other means. Transmitted information or gave a sign to convey meaning or instruction.
From Old French 'signal' and Latin 'signum' meaning mark or sign. The verb form developed from the noun, reflecting humanity's fundamental need to communicate across distances and overcome barriers to understanding.
Signaling is one of humanity's most ancient and essential skills - from smoke signals to digital signals, we've always found ways to send meaning across space and time. Interestingly, many animals signal too, suggesting that the urge to communicate beyond immediate presence is a fundamental characteristic of intelligent life.
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