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.

In the physical world, we think of rocks and mountains as immutable. No natural law commands it, and there's nothing about it that's immutable or permanent. A mighty sequoia that is immutable in its …

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

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

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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 , …

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

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.

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. …