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From Latin mutabilis (liable to change); mutate +‎ -able.



mutable (comparative more mutable, superlative most mutable)

  1. Changeable, dynamic, evolutive; inclined to change, evolve, mutate.
    • 1531, Thomas Elyot, “Of Constance or Stabilitie”, in The boke named the gouernour[1], book III, page e4v:
      Vndoughtedly constaunce is an honourable vertue, as inconstance is reprochefull and odious. Wherfore that man whiche is mutable for euerye occasyon, muste nedes often repente hym, and in moche repentance is nat only moche foly, but also great detriment: whiche euery wyse man wyll eschue if he can.
    • 1608, William Shakespeare, The Tragedy of Coriolanus, [Act III, scene i]:
      For the mutable ranke-ſented Meynie, / Let them regard me, as I doe not flatter, / And therein behold themſelues.
    • 1671, John Milton, “Samson Agonistes, []”, in Paradise Regain’d. A Poem. In IV Books. To which is Added, Samson Agonistes, London: Printed by J. M[acock] for John Starkey [], OCLC 228732398, lines 415–420, page 83:
      Maſters commands come with a power reſiſtleſs / To ſuch as owe them abſolute ſubjection; / And for a life who will not change his purpoſe? / (So mutable are all the ways of men) / Yet this be ſure, in nothing to comply / Scandalous or forbidden in our Law.
    • 1864, Rob S. Candlish, “The Fatherhood of God”, in The British and Foreign Evangelical Review, volume XIV, London: James Nisbet & Co., published 1865, page 748:
      It is in vain to interpose the explanation that the sonship was mutable. The Broad School do not say so ; and in so far they are consistent, for they recognise no power to produce the mutation.
  2. (programming, of a variable) Having a value that is changeable during program execution.
    • 2011, David Flanagan, JavaScript: The Definitive Guide:
      A value of a mutable type can change. Objects and arrays are mutable: a JavaScript program can change the values of object properties and array elements. Numbers, booleans, null, and undefined are immutable.



See alsoEdit


mutable (plural mutables)

  1. Something mutable; a variable or value that can change.






mutable (plural mutables)

  1. mutable, changeable
  2. (programming) mutable

Further readingEdit



mutable (plural mutables)

  1. mutable, changeable