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synesthesia

American  
[sin-uhs-thee-zhuh, -zhee-uh, -zee-uh] / ˌsɪn əsˈθi ʒə, -ʒi ə, -zi ə /

noun

  • synesthesias
    plural
  1. a sensation produced in one modality when a stimulus is applied to another modality, as when the hearing of a certain sound induces the visualization of a certain color.


synesthesia British  
/ ˌsɪniːsˈθiːzɪə /

noun

  1. the usual US spelling of synaesthesia

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

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Derived Forms

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Nouns


Etymology

Origin of synesthesia

First recorded in 1890–95; from New Latin; see origin at syn-, esthesia


Explanation

Synesthesia is a condition that happens when a sense, such as sight, triggers another sense, like smell, at the same time. For someone with synesthesia, each letter of the alphabet might have a different odor. Cool! Synesthesia happens when someone’s senses are blended. The word synesthesia comes from the Greek syn for “together” and the root aisthe for “to feel.” People with synesthesia often don’t realize at first that they have it — they think everyone sees the number 8 as red, for example! The writer Vladimir Nabokov writes about having synesthesia in his memoir Speak, Memory. Synesthesia is another way of perceiving the world, but it’s not a disease.

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Vocabulary lists containing synesthesia

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.

See Examples For:

“And then synesthesia would be … these rare individuals who experience additional sensations that sometimes happen to be across the senses, but most commonly sight,” Spence told Salon in a video interview.

From Salon ● Feb. 15, 2025

“Prometheus” is an extraordinary score, Scriabin’s extravagance going far beyond synesthesia.

From Los Angeles Times ● Mar. 6, 2024

You’ll notice the way synesthesia guides his pen, and you’ll pick up his themes of exile, wonder, the afterlife and the privacy and primacy of marriage.

From New York Times ● Oct. 15, 2023

However, this pioneering stretchable synesthesia display shatters preconceived boundaries by offering unparalleled optical performance and precise sound pressure levels.

From Science Daily ● Oct. 12, 2023

I’ve never met anyone who wanted their synesthesia to go away.”

From "A Mango-Shaped Space" by Wendy Mass

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