signal
SIG-num
signal
This sample demonstrates technical semantic drift. Replace the placeholder citations with the sources that matter in your domain.
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The journey
Mark
signum SIG-num
"mark, token, standard"
Latin register
A signal is first a sign made visible, then a message made transmissible.
Token
signal signal
formal mark, indication, summons
Technical
signal signal
from telegraph and electrical engineering · nineteenth-century technical systems
The sign becomes measurable: pulse, wave, voltage, packet.
specialized
Modern Usage
Colloquial
signal
Literary
sign
Modern use moves between gesture, device, and network transmission.
Sources
Sources pending.