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Definitions
Trivia Time
In Greek mythology, which shape-shifting sea god could alter his appearance at will?

alter

[awl-ter] / ˈɔl tər /




Usage

What is another way to say alter? To alter is to make some partial change, as in appearance, while still preserving the identity: to alter a dress, as by raising the hem (to change a dress would mean to put on a different one). To change is to make a material difference so that something is distinctly different from what it was: to change one's opinion. 

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:

For others going through a difficult time — divorce, death, unexpected medical bills, a house with a dodgy foundation — studies show that chronic stress can alter your brain chemistry and lead to poor decision-making.

From MarketWatch ● Oct. 26, 2026

Only instead of just peacefully apprehending opponents, Doncic’s super-competitive alter ego wants to smash them all under an array of increasingly rude step-back jumpers.

From Los Angeles Times ● Oct. 23, 2026

With a seeming flick of a switch, he has the power to alter the course of a deadly conflict.

From The Wall Street Journal ● Oct. 21, 2026

Known for hits such as School's Out, Poison and I'm Eighteen, Cooper, whose real name is Vincent Damon Furnier, spoke about the stark difference between himself and his on-stage alter ego.

From BBC ● Oct. 20, 2026

Laney—the youngest Vanderbeeker—had transformed into her alter ego, Panda-Laney.

From "The Vanderbeekers of 141st Street" by Karina Yan Glaser

In that scene, Rhys Harries impressively alters his own features without makeup.

From Los Angeles Times ● Oct. 23, 2026

That alters the calculation about when to draw benefits.

From The Wall Street Journal ● Sep. 30, 2026

In her version, Bernhard alters the lyrics to pay tribute to Sylvester, whose untimely death left an immense legacy.

From Salon ● Sep. 5, 2026

Infant formula is designed to provide the correct balance of nutrients for babies when mothers cannot or choose not to breastfeed, and adding extra water alters that balance.

From BBC ● Aug. 16, 2026

How writing or just thinking your name alters my mood.

From "Salt to the Sea" by Ruta Sepetys

Authorities determined that Owens altered an ultrasound image, fabricated a pregnancy video and lied under oath claiming she was pregnant, according to a statement from prosecutors at the time.

From Los Angeles Times ● Oct. 26, 2026

Shocked minerals are particularly important because their internal crystal structures have been altered by immense pressure.

From Science Daily ● Oct. 21, 2026

Yesterday is about a struggling musician who wakes up one day to find an altered world where no-one has heard of The Beatles.

From BBC ● Oct. 19, 2026

Understand the world with the help of the Muppets: In 2012, Dahlia Lithwick published a piece of cultural analysis that permanently altered how readers viewed their marriages, their workplaces, and the U.S.

From Slate ● Oct. 16, 2026

Even that one had to be slightly altered by a carpenter to satisfy his demand.

From "Endgame" by Frank Brady

Fintech founders have caught on to how Americans are altering their financial habits, and they’ve created new products to try to meet the moment.

From MarketWatch ● Oct. 13, 2026

"You're altering the microbiome of your gut, and perhaps creating antibiotic resistant bacteria in your body that will fight off the drug therapy the next time you really need it," he said.

From Barron's ● Oct. 8, 2026

"Inside the body, we can't do that post-manufacturing quality control, so we really needed to optimize the approach upfront to avoid altering any other cells."

From Science Daily ● Oct. 7, 2026

Barr revises the work, altering identifying details, and publishes it to acclaim as a novel of his own.

From The Wall Street Journal ● Oct. 6, 2026

Master Twyti came every Christmas without altering a hair.

From "The Once and Future King" by T. H. White


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