signal

[sig-nl]

noun

1. anything that serves to indicate, warn, direct, command, or the like, such as a light, a gesture, an act, etc.: a signal to leave.

   a traffic signal;

   a signal to leave.

   Synonyms: sign

2. anything agreed upon or understood as the occasion for concerted action.

3. an act, event, or the like that causes or incites some action.

   The unjust execution was the signal for revolt.

4. a token; indication.

   Synonyms: sign

5. Electronics.,  an electrical quantity or effect, as current, voltage, or electromagnetic waves, that can be varied in such a way as to convey information.

6. Cards.,  a play that reveals to one's partner a wish that they continue or discontinue the suit led.

adjective

1. serving as a token or indication; used in communiating an intention, warning, or command.

   a signal flag.

2. unusual; notable; outstanding.

   a signal exploit.

   Synonyms: striking, remarkable, exceptional, unique

verb (used with object)

signaled, signaling , signalled, signalling .

1. to make a token or indication to.

2. to communicate or make known by a token or indication.

verb (used without object)

signaled, signaling , signalled, signalling .

1. to make communication by something that serves to indicate, warn, direct, command, or the like.

signal

/ ˈsɪɡnəl /

noun

1. any sign, gesture, token, etc, that serves to communicate information

2. anything that acts as an incitement to action

   the rise in prices was a signal for rebellion

3. 1. a variable parameter, such as a current or electromagnetic wave, by which information is conveyed through an electronic circuit, communications system, etc

   2. the information so conveyed

   3. ( as modifier )

      signal strength

      a signal generator

adjective

1. distinguished or conspicuous

2. used to give or act as a signal

verb

1. to communicate (a message, etc) to (a person)

signal

1. A fluctuating quantity or impulse whose variations represent information. The amplitude or frequency of voltage, current, electric field strength, light, and sound can be varied as signals representing information.

Other Word Forms

• signaller noun
• signaler noun
• presignal noun
• resignal verb
• unsignaled adjective
• unsignalled adjective

Word History and Origins

Origin of signal¹

First recorded in 1350–1400; Middle English noun from Old French seignal, signal, from Medieval Latin signāle, Late Latin, noun use of neuter of signālis “of a sign”; sign, -al ², -al ¹

Word History and Origins

Origin of signal¹

C16: from Old French seignal, from Medieval Latin signāle, from Latin signum _sign

Example Sentences

Trade groups representing publishers praised the Anthropic settlement on Friday, noting it sends a big signal to tech companies that are developing powerful artificial intelligence tools.

From Los Angeles Times

Mahmood's appointment is a signal that the government sees dealing with illegal immigration and asylum as one of its biggest priorities.

From BBC

Sweden has accused Russia of being behind a significant rise in instances of GPS signal jamming recorded over the Baltic Sea, raising concerns for aviation in the region.

From BBC

And, of course, “Brown food tastes good” reminded you that color signals flavor, that the hiss and smell of fond in a pan promised richness waiting to be coaxed into a sauce.

From Salon

The source pointed to the demarcation line between North and South Korea, where a ceasefire had lasted for years with a powerfully armed, allied American deployment serving as a signal to North Korea.

From BBC

Related Words

• alarm 
• beacon 
• cue 
• gesture 
• indicator 
• sign