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.

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

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 , …

immutable meaning, definition, what is immutable: never changing or impossible to change: Learn more.

Dec 28, 2025 · (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/ …

Unable to be changed without exception. The government has enacted an immutable law.

There are many things in life that are immutable; these unchangeable things include death, taxes, and the laws of physics. The adjective immutable has Latin roots that mean "not changeable."