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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.

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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

Further experiments revealed that interactions with the surface can cause molecules to align in particular directions and alter their energy levels.

From Science Daily ● Oct. 20, 2026

In criminal cases, witnesses who will be testifying are required to sit outside the courtroom so they can’t alter their testimony based on what other witnesses say.

From "Just Mercy" by Bryan Stevenson

Social Security recipients can get an additional benefit for dependent children, which alters the calculation about when to draw benefits.

From The Wall Street Journal ● Sep. 29, 2026

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

Whether released into soil or water or a man’s blood, these unrelated chemicals do not remain segregated; there are mysterious and unseen changes by which one alters the power of another for harm.

From "Silent Spring" by Rachel Carson

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

The company has been panned by some academics and scientists, who doubt Colossal’s claims of scientific breakthroughs and warn that introducing heavily genetically altered creatures can cause dangerous ecological disruption.

From The Wall Street Journal ● Oct. 23, 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

In laboratory experiments involving 39 sweeteners and 25 species of gut bacteria, researchers found that roughly three-quarters of the sweeteners altered the growth of at least one bacterial species.

From Science Daily ● Oct. 18, 2026

White was convinced that somebody had altered the crime scene.

From "Killers of the Flower Moon" by David Grann

Rather than simply illuminating a specimen, the laser interacts directly with the microscope's electron beam, altering its phase to increase image contrast.

From Science Daily ● Oct. 22, 2026

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

Hisao was lean and tough and worked methodically, never altering his pace.

From "Snow Falling on Cedars: A Novel" by David Guterson


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