plural alterations
Synonyms of alteration
1
: the act or process of altering something
The dress needs alteration for a proper fit.
: the state of being altered
2
: the result of changing or altering something: such as
a
: a change made in fitting a garment
no charge for alterations
b
: a change in a legal instrument that alters its legal effect
She made some alterations to her will.
c
: a mineral that has been altered by a chemical process : metasomatism

Examples of alteration in a Sentence

the alteration of the pattern They did a good job on the dress alteration. He made alterations in his will.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
That change will be accompanied by significant alterations to the competition structure, which includes divisions and a new postseason format. Paul Tenorio, New York Times, 4 Aug. 2026 Some alterations were made for the WPBL, including a temporary outfield fence that shortened the center field fence from 415 to 330 feet and other dimensions accordingly. James Raia, Mercury News, 3 Aug. 2026 Furthermore, no video-like sequences may be created, and no alterations may be made to the image, either in the foreground or the background. Hugh McIntyre, Forbes.com, 1 Aug. 2026 By comparing the mummies’ viral traces with historical examples, Nakagome and colleagues saw that the virus experienced an extended period of genetic alterations until the 16th century. Andrew Paul, Popular Science, 30 July 2026 See All Example Sentences for alteration

Word History

Etymology

Middle English alteracioun "change, transformation," borrowed from Anglo-French & Medieval Latin; Anglo-French alteracion, borrowed from Medieval Latin alterātiōn-, alterātiō, from Late Latin alterāre "to change, alter" + Latin -tiōn-, -tiō, suffix of verbal action

First Known Use

14th century, in the meaning defined at sense 1

Time Traveler
The first known use of alteration was in the 14th century

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Cite this Entry

“Alteration.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/alteration. Accessed 6 Aug. 2026.

Kids Definition

1
a
: the act or process of altering
b
: the state of being altered
2
: the result of altering : modification

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