Immutable

ahd-5
  • adjective. Not subject or susceptible to change.
  • The Century Dictionary and Cyclopedia
  • Not mutable; not capable or susceptible of change; not subject to mutation; unchangeable; invariable; unalterable.
  • In zoology, not subject to variation in different individuals of a species; permanent: as, immutable characters or marks
  • the GNU version of the Collaborative International Dictionary of English
  • adjective. Not mutable; not capable or susceptible of change; unchangeable; unalterable.
  • Wiktionary, Creative Commons Attribution/Share-Alike License
  • adjective. Unable to be changed without exception.
  • adjective. Not able to be altered in the memory after its value is set initially, such as a constant.
  • noun. Something that cannot be changed.
  • WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
  • adjective. not subject or susceptible to change or variation in form or quality or nature
  • Word Usage
    "Even space, seemingly immutable, is able to be truncated by circumstance."
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