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.

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

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

Unchanging through time; unalterable; ageless.... Click for English pronunciations, examples sentences, video.

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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Define immutable. immutable synonyms, immutable pronunciation, immutable translation, English dictionary definition of immutable. adj. Not subject or susceptible to change. im·mu′ta·bil′i·ty , …

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.

WordReference Random House Learner's Dictionary of American English © 2025 im•mu•ta•ble /ɪˈmyutəbəl/ adj. unchangeable: the immutable laws of physics. im•mu•ta•bil•i•ty /ɪˌmyutəˈbɪlɪti/ n. …