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Definitions

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.

Researchers from Stockholm University, Nordita, and the University of Tübingen propose looking at how these waves subtly alter the light emitted by atoms.

From Science Daily • Apr. 10, 2026

It can also alter polar and tropical jet streams, sending storms on a path through Southern California and the southern United States, experts say.

From Los Angeles Times • Apr. 9, 2026

Future technologies could even allow companies to alter the course of a storm or reduce its intensity.

From The Wall Street Journal • Apr. 6, 2026

McGuigan calls the brashness part of an "alter ego", suggesting Caroline is playing the part, but also sees a deeper link to the independence she has carved out.

From BBC • Apr. 5, 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




Vocabulary lists containing alter