signal
SIG-nuhl
/ˈsɪɡnəl/
An electrical impulse or radio wave transmitted or received; a gesture, sound, or action conveying information or an instruction.
In broadcasting, it's the encoded information (audio, video) carried by electromagnetic waves.
The story behind the word. The word 'signal' comes from the Latin 'signum,' meaning 'mark, token, or sign.' It entered English through Old French, initially referring to a sign or indication. With the development of communication technologies, it naturally extended to mean an impulse or wave carrying information, becoming central to the language of broadcasting.
Word relationships
- transmission: Transmission is the act of sending; a signal is the thing being sent.
- indication: Broader, refers to any sign; 'signal' can be more specific, especially in technical contexts.
Word family
- sign (noun): An indication or symbol.
- signature (noun): A person's name written in a distinctive way.
Collocations
- radio signal
- weak signal
- strong signal
- digital signal
Idioms & expressions
- send a signal
- get a signal
Example sentences
- "We drove further into the mountains, and the radio signal became weaker and weaker until it disappeared entirely." Describing radio quality.
- "The flashing red light was a clear signal that something was wrong with the machinery." Referring to a warning.
Memory hook
A 'signal' is a 'sign' that carries information. Sign of Info
When not to use
While 'signal' has many meanings, in broadcasting, it specifically refers to the technical transmission. Avoid using it for a general 'sign' or 'indication' if a more precise word exists.
Fun facts
- Morse code is a system of signals (dots and dashes) used for communication.
Related words
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