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Synonyms

redden

American  
[red-n] / ˈrɛd n /

verb (used with object)

reddens, present (3rd person singular) reddened, past participle, past reddening present participle
  1. to make or cause to become red.


verb (used without object)

reddens, present (3rd person singular) reddened, past participle, past reddening present participle
  1. to become red.

  2. to blush; flush.

redden British  
/ ˈrɛdən /

verb

  1. to make or become red

  2. (intr) to flush with embarrassment, anger, etc; blush

"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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Etymology

Origin of redden

First recorded in 1605–15; red 1 + -en 1

Explanation

When something reddens, its color changes so that it looks red. In autumn, the leaves on some trees redden before they fall to the ground. If the sky reddens at dusk, you might remember the rhyme "red sky at night, sailor's delight." Pale people redden too, when they blush or flush with embarrassment. A child coloring a picture with crayons might redden the sky and shade the trees blue and purple. The Old English root, meaning "become red," is readian.

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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:

Ever wondered why your cheeks redden when all eyes are on you?

From BBC Jul. 17, 2024

Dust can absorb blue light, and redden the object.

From Washington Post Aug. 26, 2022

From its color, Ellis and his colleagues knew at least some of its stars were mature, because they tend to redden with age.

From Science Magazine Jun. 30, 2022

Bliss “is the exact reason women and men don’t report these crimes,” Feden said, as Bliss’ face appeared to redden.

From Reuters Apr. 26, 2018

Her cheeks redden, and her normally cocky voice comes out shaky and uncertain.

From "Amari and the Night Brothers" by B.B. Alston

I suspect the raw, honest anger that reddens her eyes comes from a place of knowing and experience.

From Salon Sep. 24, 2023

He explained he takes antibiotics every day as he has rosacea, which reddens and can deform the face.

From BBC Jan. 26, 2022

Ceylon has a yellow perianth with a rich orange cup that reddens over the blooming period.

From Seattle Times Oct. 6, 2021

When a star moves toward us, its light will appear ever-so-slightly bluer, and when the star recedes, it reddens.

From Scientific American Nov. 12, 2019

He rubs the back of his neck; his face reddens with each step until he’s almost crimson.

From "Internment" by Samira Ahmed

The heat from the fire melted the paint on some helmets and reddened the skin in the small gaps between the masks, Marchuk said.

From The Wall Street Journal Jun. 18, 2026

But it turns out, the reddened Redick only made them tougher.

From Los Angeles Times Apr. 23, 2025

These analyses revealed that reddened cells not only had a high concentration of diadinoxanthin, the most abundant carotenoid in E. gracilis, but also produced an unidentified xanthophyll-type carotenoid.

From Science Daily Apr. 15, 2024

On other similar occasions she said Theo would come out of his room with his T-shirt ripped and reddened, and he'd need a plaster.

From BBC Jan. 4, 2024

The skin across his cheekbones was cracked and reddened from a life spent outdoors, and his eyes were blue as glacier ice.

From "The Long-Lost Home" by Maryrose Wood

He repeated the claim over and over, reddening and breaking into a sweat.

From Salon Jun. 13, 2026

Officers said they have identified a person of interest who is believed to be mixed race, aged in their 20s to 30s and had brown eyes which showed signs of reddening.

From BBC Jan. 11, 2025

Interestingly, the researchers found that strong red-light irradiation at 605-660 nm triggered a reddening reaction in E. gracilis when cultured in bonito stock.

From Science Daily Apr. 15, 2024

Saban said, clicking his teeth and looking away with reddening eyes.

From Los Angeles Times Jan. 2, 2024

He took out his handkerchief and blotted furiously at his upper lip, his freckles standing out like specks of dirt against his reddening complexion.

From "The City Beautiful" by Aden Polydoros

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