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Definitions

alter

[awl-ter] / ˈɔl tər /
VERB
change
Synonyms
STRONGEST
adjust amend change develop modify reshape revamp revise shift transform vary
STRONG
adapt convert cook diversify doctor metamorphose mutate recast reconstruct refashion reform remodel renovate transmute turn
WEAK
correct mid-course dial back fine tune make different phony up recalibrate
Antonyms
STRONGEST
leave alone remain stagnate stay
WEAK
continue fix keep let stand maintain preserve retain sustain
VERB
sterilize animal
Synonyms
STRONGEST
change fix
STRONG
caponize castrate desexualize emasculate geld mutilate neuter spay unsex
Antonyms
STRONG
breed

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.

He paved the way for a second and third generation of L.A. theatrical mavericks, notably Peter Sellars and Yuval Sharon, who newly and profoundly alter perception.

From Los Angeles Times • May 11, 2026

But investor appetite led Cerebras to alter that in a Monday filing with the U.S.

From Barron's • May 11, 2026

That time span, which felt like an age, became the moment that has the capacity to alter the immediate course of history for Arsenal and West Ham United.

From BBC • May 10, 2026

Many variables can alter your pace from day to day or week to week.

From The Wall Street Journal • May 9, 2026

If they thought that would force her to alter her manner, admit she needed to look for a husband—they were wrong.

From "Jazz" by Toni Morrison

Vocabulary lists containing alter

Jim Burke's Academic Vocabulary List

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Words to Know Before You Defrost the Bird

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Commonly Confused Words, List 1

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