noun
-
an adjustment, change, or modification
-
the act of altering or state of being altered
Other Word Forms
- prealteration noun
- proalteration adjective
- realteration noun
Etymology
Origin of alteration
First recorded in 1350–1400; Middle English alteracioun, from Medieval Latin alterātiōn-, stem of alterātiō; equivalent to alter + -ation
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.
All three share the same alteration in the GPX4 gene, identified as the R152H mutation.
From Science Daily • Dec. 9, 2025
She cites an alteration in the “tone of their correspondence,” pointing to “a declaration, a recognition, or more” that “changes everything.”
From The Wall Street Journal • Nov. 21, 2025
UFC had argued that the alteration of the water carried health risks.
From Barron's • Nov. 18, 2025
At the time, Rahm argued that such an alteration would help the game unify.
From BBC • Nov. 4, 2025
He was followed by Johnnie Voight, Cleve Goins, and Doc Ratteree but the order of their entry was subject to caprice and alteration.
From "The Great Santini" by Pat Conroy
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.
