/ Dictionary / Index I immutable: Meaning and Definition of Find definitions for: im•mu•ta•ble Pronunciation: (i-my'tu-bul), [key] — adj. not mutable; unchangeable; changeless. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: immutable (Thesaurus) immure Imogene Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language