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

alter

[awl-ter] / ΛˆΙ”l tΙ™r /




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:

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

The laboratory findings suggest that certain sweeteners and medications can interact in ways that substantially alter the growth of particular gut microbes.

From Science Daily ● Oct. 18, 2026

AI is surpassing human abilities in pursuits from mathematics to computer programming, while threatening to alter or even eradicate many jobs.

From Barron's ● Oct. 16, 2026

The Librarian had answered, “Because a single stone can alter the course of a river.”

From "The Reader" by Traci Chee

Spanish meteorological research group Climatoc-Lab described it as "a manifestation of how global warming alters the hydrological cycle".

From BBC ● Sep. 22, 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

Future studies could determine whether it alters other features of the mouth that contribute to healthy teeth and gums.

From Science Daily ● Jul. 27, 2026

He used his remission to promote CAR T-cell therapy, which genetically alters one’s cells to fight cancer, after he said chemotherapy stopped working.

From Los Angeles Times ● Jul. 13, 2026

“My guess is that the needle injected you with a transmitter,” he says, “and the gas was an aerosol version of the liquid that alters the brain. But why...”

From "Insurgent" by Veronica Roth

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

The bacterial community exposed to the isosteviol and duloxetine combination showed increased toxicity toward certain host cells and altered the behavior of other cells involved in inflammation and immune responses.

From Science Daily ● Oct. 18, 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

But open-weight models like those released by Chinese companies can be more easily altered and optimized by users for nefarious purposes.

From The Wall Street Journal ● Oct. 15, 2026

Riddles like “El caso que te hago es poco” were all right, but to keep things interesting Papá had always altered the riddles and personalized them to fit our family.

From "Summer of the Mariposas" by Guadalupe GarcΓ­a McCall

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

From The Wall Street Journal ● Oct. 16, 2026

The warming phase of a natural climate cycle, El Nino events temporarily elevate global temperatures, altering cloud and wind patterns, and raise the risk of damaging weather.

From Barron's ● Oct. 15, 2026

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

By altering this protective environment rather than targeting only the cancer cells themselves, vitamin D analogs could offer a way to make other therapies more effective.

From Science Daily ● Oct. 4, 2026

He may do this methodically, or he may do it unconsciously by preserving the individuals most useful to him at the time, without any thought of altering the breed....

From "Cosmos" by Carl Sagan


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