Key and Signal

Key

Key adjective - Coming before all others in importance.

Usage example: maintains that Sir Isaac Newton remains the key figure in physical science

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Signal and key are semantically related. In some cases you can use "Signal" instead the word "Key" as a noun or an adjective.

Nearby Words: keyed, keyboard, keying

Signal adjective - Standing above others in rank, importance, or achievement.

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Key and signal are semantically related. Sometimes you can use "Key" instead the word "Signal" as a noun or an adjective.

special	special key	special signal
particular	particular key	particular signal
similar	similar key	similar signal
specific	specific key	specific signal
Other adjectives: certain, standard, original, light, green, single, powerful, actual, real, large, wrong, blue, bad, private, secret, new, mysterious, strange, last, red.

This gives Krusty the chance to comment, "Check out those mogumbos." This key word was the elephant's signal to play dead, and it spits out Homer intact.

Source: Heroic Seductress
Later in the game, the Andromeda's signal intercept capabilities play a key role in the plot.

Source: Video Game / Ace Combat 5: The Unsung War
Amusingly enough, the music picks up right after he explains his signal for "Pick up the tempo." The key to comedy is timing.

Source: Western Animation / A Charlie Brown Christmas

Cite this Source

Signal and Key. (2016). Retrieved 2026, August 03, from https://thesaurus.plus/related/key/signal

Key & Signal. N.p., 2016. Web. 03 Aug. 2026. <https://thesaurus.plus/related/key/signal>.

Signal or Key. 2016. Accessed August 03, 2026. https://thesaurus.plus/related/key/signal.

Google Ngram Viewer shows how "key" and "signal" have occurred on timeline