brighten

verb

bright·​en ˈbrī-tᵊn 

brightened; brightening ˈbrīt-niŋ 

ˈbrī-tᵊn-iŋ

intransitive verb

: to become bright or brighter

transitive verb

1

: to make bright or brighter

you brightened my day

2

: to enhance or intensify the flavor of (food) especially by adding an acidic element (such as citrus juice or vinegar)

Crisp lemon slices brighten smoky bacon and rosemary-infused trout.

—Melissa Roberts-Matar

brightener

ˈbrīt-nər 

ˈbrī-tᵊn-ər

noun

Synonyms of brighten

• lighten
• glow
• revive

Examples of brighten in a Sentence

He brightened the picture on the television.

Flowers can brighten any room.

The good news brightened her mood.

The sky brightened after the storm.

Business prospects brightened last month.

Her face brightened in relief when she heard that he was not hurt.

Recent Examples on the Web

Niacinamide and vitamin C can help brighten and even out skin tone. — Casey Delbasso, ABC News, 24 Aug. 2026

Meanwhile, glycerin, betaine, sodium hyaluronate, panthenol, and beta-glucan flood the area with hydration, while niacinamide brightens the look of dullness and uneven tone. — Christa Joanna Lee, Allure, 20 Aug. 2026

The northern lights may brighten the skies tonight, August 20, into tomorrow morning, according to the National Oceanic and Atmospheric Administration’s Space Weather Prediction Center (SWPC). — Michele Laufik, Martha Stewart, 20 Aug. 2026

Most of all, Kay praises the formula for its smoothing and radiance-boosting effects, which can be chalked up to humectants like glycerin and propylene glycol, plus brightening Japanese persimmon leaf extract and camellia seed oil. — Jenny Berg, InStyle, 19 Aug. 2026

Word History

First Known Use

14th century, in the meaning defined at intransitive sense

Rhymes for brighten

• chitin
• frighten
• heighten
• lighten
• phaeton
• tighten
• titan
• triton
• whiten
• enlighten
• exciton
• periphyton

Kids Definition

brighten

verb

bright·​en ˈbrīt-ᵊn 

brightened; brightening ˈbrīt-niŋ 

-ᵊn-iŋ

: to make or become bright or brighter