Meaning & use

immutable

adjective·Advanced

Last updated

Unable to be changed over time or in any circumstance.

See it in a sentence

Physicists once considered the laws of nature to be immutable.

In some programming languages, certain data types are immutable once created.

A note on using this word

Common in philosophy, law, and computer science when describing something fixed by design or nature.

Words with a similar meaning

unchangeablefixed

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Words with an opposite meaning

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