Immutable may describe something that is incapable of change, but the word itself—like all words—is mutable, both capable of and prone to alteration.

It is now possible to combine robust, rapidly deployable contemporary technology and the immutable qualities of architecture.

IMMUTABLE definition: not mutable; unchangeable; changeless. See examples of immutable used in a sentence.

Definition of immutable adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

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Factsheet What does the adjective immutable mean? There are three meanings listed in OED's entry for the adjective immutable. See ‘Meaning & use’ for definitions, usage, and quotation evidence.

Jan 20, 2026 · (programming, of a variable) Not able to be altered in the memory after its value is set initially. Constants are immutable.