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Definitions

signal

[sig-nl] / ˈsɪg nl /
ADJECTIVE
extraordinary, outstanding
Synonyms
STRONGEST
conspicuous momentous noteworthy noticeable salient
STRONG
arresting characteristic distinguished individual marked notable pronounced striking
WEAK
arrestive distinctive eminent exceptional eye-catching famous illustrious memorable peculiar prominent remarkable renowned significant
Antonyms
STRONGEST
inconspicuous insignificant obscure unimportant unnoticeable
STRONG
common ordinary vague
WEAK
unexceptional unimpressive unnoteworthy
NOUN
indication; authorization
Synonyms
STRONGEST
alarm beacon cue gesture indicator sign
STRONG
Mayday SOS alert bleep blinker flag flare go ahead mark movement nod okay omen tocsin token wink
WEAK
green light high sign
Antonyms
STRONG
denial refusal veto
VERB
indicate; give a sign to
Synonyms
STRONGEST
warn
STRONG
beckon communicate flag flash gesticulate gesture motion nod semaphore sign signalize wave wink

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

To western drywood termites, pinene can signal food.

From Science Daily • May 9, 2026

But a decline over time can signal a problem—whether it’s with your hearing or something else.

From The Wall Street Journal • May 9, 2026

The appointments of Brown and Baroness Harman signal the prime minister's intentions to refresh his government.

From BBC • May 9, 2026

The first step would be another classic sell signal, which will occur if SPX closes below its +3σ band.

From MarketWatch • May 8, 2026

That person would signal with a specific three-note whistle as he approached.

From "Chasing Lincoln's Killer" by James L. Swanson

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