to make different in some particular, as size, style, course, or the like; modify.
to alter a coat; to alter a will; to alter course.
to castrate or spay.
What is another way to say alter?
To alter something is to make it different in some particular way, such as in size, style, or course. How does alter compare to change? Find out on Thesaurus.com.
See adjust,
First recorded in 1350–1400; Middle English, from Old French alterer, from Late Latin alterāre “to change, worsen,” derivative of Latin alter “other”
After eating too many gingerbread cookies, she no longer fit into her uniform, so she had a seamstress alter it. It looked pretty much the same. The verb alter can also mean to neuter or spay. Think of a cat that has just been spayed: the cat you pick up from the vet is the same cat that you dropped off there, only perhaps a little groggy and unable to reproduce. While the cat has been altered, it's not a different cat.
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Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
“I didn’t know that it was anything that would bypass any sort of verification,” said Alter, 43 years old, who splits his time between New York state and Canada.
From The Wall Street Journal • Nov. 27, 2025
However, in context, it is clear that Alter is criticizing a strain of anarchist activism in the United States.
From Salon • Sep. 23, 2025
Originally from Beaumont, Texas, Alter first got into background acting to learn her way around L.A. and meet people.
From Los Angeles Times • Feb. 27, 2025
Entitled Alter Ego, it includes singles Moonlit Floor, which interpolates Sixpence None the Richer's classic track Kiss Me, as well as New Woman featuring Spanish star Rosalía, and hip hop track Rockstar.
From BBC • Feb. 23, 2025
“See, Alter, he’s almost as rude as you are,” Frankie muttered under his breath as he helped me to my feet.
From "The City Beautiful" by Aden Polydoros
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
